Tensile strength 1560 MPa, what is the concept?

There are many types of titanium alloys, and the tensile strength of cutting-edge titanium alloy research is a very important index.

According to the index value of tensile strength, titanium alloy with high strength can be called 'high-strength titanium alloy', which refers to a titanium alloy with a tensile strength between 1100 MPa and 1400 MPa at room temperature, and is composed of nearly β titanium alloy and a substable β titanium alloy.

This is also the origin of the tensile strength of conventional titanium alloys below 1400 megapascals.

If the tensile strength value of titanium alloy is higher, it will be out of the category of 'conventional' and is called 'ultra-high-strength titanium alloy'.

This kind of titanium alloy is in the international development stage.

Various countries and top institutions are doing research on 'ultra-high-strength titanium alloy', and some institutions and large enterprises have made research index definitions for ultra-high-strength titanium alloys.

For example, Ameriken's Boeing, their research indicators for super-strong titanium alloys are: tensile strength greater than 1500 megapascals at room temperature, shear strength greater than 860MPa, elongation greater than 8%, loading stress equal to 45% tensile strength at room temperature fatigue cycles are not less than 100,000 times, and so on.

Under this data index, it is considered to be a promising titanium alloy with the serial number Ti8V5FelAl sub-stable β, whose typical mechanical properties reach room temperature tensile strength of more than 1480 MPa and elongation of 8%.

Today, titanium alloys manufactured in metal laboratories have a tensile strength of more than 1,560 megapascals, which is 50 megapascals higher than the definition of ultra-high-strength titanium alloys.

Although other properties have not been tested, titanium alloy has a very important feature, its tensile strength and yield strength values are similar, and other indicators, including also have a certain relationship.

Even if other data indicators are not ideal, it doesn't matter much, the research project of the metal laboratory is originally a single direction of material science research, and their research purpose is to continuously improve the strength of titanium alloys, so that the research and development results can provide reference for the application and research and development of titanium alloy materials.

As long as the strength of the finished product is increased to a certain value, the project can be said to be completed.

In the past, titanium alloys with tensile strength of more than 1,400 megapascals could already be used as a settlement project, but the manufacture of 1,560 megapascals was simply unthinkable.

Conventional means to manufacture more than 1,500 megapascal titanium alloys, which are not available in the world for the time being, in other words, they have completed more than the highest international level of results, and are at the forefront of the research and development of ultra-high-strength titanium alloys.

Everyone in the metals lab knows what the figure of 1,560 megapascals represents.

Every one of them was excited, everyone was excited.

Peng Hui's face was also flushed with excitement, he was excited for a while, and even danced a little, and it took a long time to calm down and start to explain his work, "Everyone pay attention, don't spread this matter first!" ”

"Du Hai, you will continue to be responsible for testing."

"Wan Yiming, sort out all the processes and data of this manufacturing, and you must sort out them in more detail, and every small number must be recorded!"

After he finished speaking, he added, "After it is sorted out, I will send a copy to Professor Wang Hao." ”

"Good!"

The lab continues to get busy.

……

On the same day, Wang Hao received the experimental data sent by the metal laboratory, because it was too late, he just glanced at the parameters of the finished product, and knew that the expected goal was reached, so he calmly slept and rested.

The next day, he was in the mood to take a closer look at the experiment logs.

The Institute of Metal Research sent two experimental records, the last one and this time, respectively, to produce titanium alloys with tensile strength of 1410 megapascals and 1560 megapascals.

These two experiments can be said to be very successful, and the process records and data content contained in them are very valuable for reference.

Wang Hao can also be sure that the analysis he made is on the right path, but he still has to continue to work hard, and the experimental data analysis work has not yet been completed.

The next three courses last week brought another 63 inspiration boosts, and the inspiration value has reached 70 points so far, and it is only 30 points short of reaching 100.

Wang Hao is still looking forward to it.

With the experience of data analysis for Navitas, we know that we can continue to refine the relevant analysis conclusions next time, and we can also continue to improve the strength of the finished product.

"Because it's made by conventional means. If it can be raised to 1700 megapascals, it should completely surpass the top international level. ”

"It's worth celebrating to be able to reach this value."

Wang Hao thought about it while thinking about it, his work was still very busy, and many things were piled up at the beginning of the month.

For example, journalist interviews.

This time, a reporter came to interview, mainly because "New Advances in Mathematics" released a new issue, and his research on finding Mersenne primes was published in the first content.

The publication of the paper also made the mathematical community continue to discuss the Mersenne prime, and many mathematical circles mentioned a name - 'Wang's conjecture'.

The evaluation of the paper by the review editor of "New Advances in Mathematics" also mentioned the 'Wang's conjecture', "This is not a perfect proof, but a conjecture that can help find the Mersenne prime." ”

"Referring to the news released by the Chinese side and GIMPS, they found several Mersenne primes, including even a super-large Mersenne prime number of 100 million digits, which is enough to prove that in the Mason numbers of no more than one billion digits, the 'Wang's conjecture' is valid."

"Interestingly, starting today, we have two conjectures about Mersenne primes......"

The other is the Zhou conjecture.

Zhou's conjecture is very famous, it is a description of the distribution of Mersenne primes, many mathematicians, have carefully studied Mersenne primes, and also tried to prove Zhou's conjecture, but all failed.

Compared with Zhou's conjecture to describe the distribution, Wang's conjecture has a clear purpose, that is, to find Mersenne primes.

Wang's conjecture also served its purpose.

In the field where it can be calculated, it covers more than two-thirds of the Mersenne primes.

Compared with Zhou's conjecture that even ordinary people can understand, the content of Wang's conjecture is much more complicated, and the two functions shaped are a headache to look at, and non-graduate students of the Department of Mathematics or above cannot even understand the content of functions.

The reporter came to interview Wang Hao because of the paper published by "New Advances in Mathematics".

Some time ago, the research on Mersenne primes made a lot of noise, which attracted great attention from public opinion, and the reporter also wanted to know more about it, such as when to make a report on the results.

Wang Hao said a few words in an interview, he did not talk about the content of the results, but made it clear that he would go to the Mathematical Science Center of Shuimu University to give a report after the year.

He said sincerely, "It was Professor Qiu Chengwen from the Center for Mathematical Sciences who invited me, and I thought about it carefully, and it was easier to go there to give a report. ”

After that, Wang Hao didn't say anything more.

New Advances in Mathematics published his papers, which had little impact on him.

The discussion in the academic circle did not affect him, and his life was not affected in any way, because the school side, including others, had already known about the news.

In the meantime, there is other good news.

Beijiang Province released the results of the annual selection of three awards for natural science, technological invention and scientific and technological progress in the province, among which Wang Hao's two personal research won the second prize of natural science and the first prize of technological invention in Northern Xinjiang Province respectively.

The second prize of the Natural Science Award was "Regularity Proof of the Monge-Pei Equation"; The first prize for technological invention is "Multiplication Algorithm for Large Numbers".

The two studies won two awards, one for the first prize and one for the second prize, which is still very good overall.

Provincial awards are based on projects, and individual and team results are contested together.

"The Regularity Proof of the Monge-Pei Equation" is a world-class mathematical theoretical achievement, but in fact, the competitiveness of the award is not high, because it is not one discipline of mathematics to participate in the award selection, and the achievements of other disciplines will also compete together.

Of course.

If it is replaced by the argumentation of Atin's constant to participate in the selection, it will definitely be able to easily win the first prize of natural science in the province.

Unfortunately, the research on Artin's constant was completed a little late, and when it was completed and submitted for submission, the selection of scientific awards in the province had already begun, so we had to wait for next year.

At that time, it is likely to be directly reported and participate in the selection of national science awards.

The science and technology awards in the two provinces are not only honors, but also a total of 350,000 bonuses that do not need to be taxed, and it is definitely good news to get a little more bonus.

Wang Hao continued to devote himself to data analysis with joy.

It's a Monday at the beginning of the month.

Zhang Zhiqiang went to the finance in the morning to get the salary slips, and by the way, he also helped Wang Hao get them, and took the two salary slips in his hands.

I saw his own salary slip, and finally paid 10,465 yuan.

Wang Hao's one, after the school subsidy part of the prepayment of 20% of the individual income tax, the actual salary 314028.

Zhang Zhiqiang stared at the two salary slips and looked at them, thinking about why he and Wang Hao are both professors at Xihai University, why is there such a big gap?

At the end of the month, the salary is not even a fraction of the other party's.

Zhang Zhiqiang returned to the office with the salary slip, handed over Wang Hao's one, and then looked at it with envy and jealousy.

Wang Hao took it and glanced at the salary slip, frowning slightly, "Twenty thousand less, won't it?" For papers published at the end of the month, the subsidy will be issued next month? ”

He shook his head and didn't dwell on it, but put the pay slip in his pocket.

Keep your head down and continue your research.

Zhang Zhiqiang mechanically returned to his seat, looking at Wang Hao's movements, body, and language throughout the whole process, he felt that his heart had been flooded with tears.

The actual salary is 310,000 yuan, and he even said that he is not satisfied?

Say that there are tens of thousands less?

That look of not caring seems to be used to it?

Zhang Zhiqiang looked down at his salary slip again, carefully looked at every number, and finally all his emotions turned into a long sigh.

Then he turned his head to look out the window, his eyes slowly drifting into a daze.

He kind of understood Luo Dayong.

……

At the same time.

The metal laboratory reported the results to the Materials Science Department of the Natural Science Foundation again.

After receiving the report, the Department of Materials Science thought it was a duplicate report at first, but after a single glance, an expert immediately called the metal laboratory to determine that it was a new progress in research and development.

However, this new development is also too exaggerated, and the speed is too fast!

The result reported last Monday was the manufacture of a titanium alloy with a tensile strength of 1,410 megapascals, and only a week later, it was reported that a titanium alloy with a tensile strength of 1,560 megapascals was manufactured?

1410 megapascals, has reached the 'ultra-high strength titanium alloy' standard, normally speaking, the strength value up to ten points, can be regarded as a research breakthrough, a direct rise of 150 points, can be described as 'incredible'.

No.

It's 'unbelievable'!

Several resident experts from the Department of Materials Science got together and immediately decided to inform the other top experts to form a review team to go to the metals lab to see what was going on.

The Department of Materials Science of the Natural Science Foundation of China has a team of up to 200 experts for key projects, most of whom are scattered in various universities and R&D institutions, including 21 academicians of the Academy of Sciences and the Academy of Engineering.

It's close to 'injurious' now.

The Ministry of Materials Science found Cao Dongming, one of the leading authoritative experts in the field of titanium alloys in China.

Cao Dongming is a researcher and doctoral supervisor of the Aviation Research Institute, and the chief technical expert of the titanium alloy material technology of the Aviation Group.

In the past 20 years, Cao Dongming has led the team to innovate independently, completed 11 national key projects, completed countless titanium alloy application achievements, created an aviation titanium alloy material system in line with the domestic situation, and also won numerous awards, including the first and second prizes of scientific and technological progress, the first and second prizes of scientific and technological achievements, and the first and second prizes of national defense pre-research, and so on.

Cao Dongming's honors are innumerable, and he is considered to be the first person in the field of titanium alloy research and development in China.

When Cao Dongming heard that the metal laboratory of Xijing Jiaotong University had completed the research and development of ultra-high-strength titanium alloys, and the tensile strength of the finished product made by conventional means was as high as 1560 megapascals, he was also very shocked.

At the same time, I was very curious.

He immediately decided to leave for Xijing Jiaotong University to see what the research in the metal laboratory was like.

Cao Dongming's speed was very fast, much faster than the other experts who were coming.

At noon on Wednesday, he came to Xijing Jiaotong University with only one student, and went straight to the metal laboratory without saying hello in advance.

Peng Hui knew that there would be an expert group from the Materials Science Department, but he didn't expect that it would be Cao Dongming, and he came so quickly, the reception was a little hasty, so he could only take Cao Dongming to the office first.

Cao Dongming didn't care about hospitality or anything like that, he was more concerned about the research results, and immediately asked about related things.

Peng Hui took out a shiny alloy from the box under the bookshelf, "This is the finished product, we have tested it in detail, and the tensile strength at room temperature exceeds 1560 megapascals." ”

"Yield strength 1530 MPa, shear strength 1010 MPa, elongation between 7.5% and 8.3% ......"

He said some other data.

Cao Dongming approached and touched the surface of the alloy with his hand, "The color should be brighter, and the content of aluminum is high, right?" Professor Peng, can you tell us about the specific process? I heard from the Institute of Materials that the report you submitted last week showed that the tensile strength was 1410 megapascals, and it was a mistake in testing, or did you say that you had made a new alloy. ”

The conventional method of manufacturing a titanium alloy with a tensile strength of 1410 megapascals is also a very good achievement, but it is not so surprising that Cao Dongming will only look for the manufacturing process as a reference when studying the need to improve the strength of titanium alloys.

The tensile strength of 1560 megapascals of titanium alloy can be said to have a qualitative breakthrough in strength, and the degree of attention is completely different.

Peng Hui said, "We have improved the manufacturing process, and we have also controlled some processes, temperature regulation in the smelting process, cooling process methods, etc., because we need to increase the temperature faster, we have also used some other means......

Cao Dongming listened and nodded continuously, and asked with curiosity, "How do you know, that can help improve the strength of the final product." ”

Peng Hui hesitated, but still explained, "I have an old friend, Xia Guobin, who introduced me to Wang Hao of Xihai University, Wang Hao, you know, right?" It's the one who often makes the news, a math genius. ”

"I've heard of the number of Mason primes." Cao Dongming nodded.

"That's right! That's him. ”

Peng Hui continued, "Professor Wang Hao is not only doing mathematical theory research, he is also a top data mining expert, helping us to analyze according to experimental data and draw some conclusions. We will improve the process and process according to the conclusions. ”

"After this research is done, Professor Wang Hao has made a great contribution, and I also put Wang Hao in the second place on the list of people who reported the results this time."

The second place is already the highest.

Peng Hui is the applicant and person in charge of the project, and he must be ranked first, and no matter how great the contribution of others is, he can only be listed second.

Cao Dongming was a little puzzled when he heard it, he thought about it carefully, and said strangely, "I remember that last week, I saw Wang Hao in the investigation report on the interruption of a titanium alloy project of the aviation group, he was doing data work, but he didn't seem to understand material science, and he didn't find the error of reporting experimental data, how could he ......?"

"Are you sure you're not mistaken?"

"Is it the doctor of Donggang University, and then Wang Hao, who was dismissed by Donggang?"

Peng Hui laughed instead, and he said with great certainty, "It's that Wang Hao!" ”

"Professor Cao, you don't have to doubt that there was such a big fuss some time ago, you should have heard about Donggang's dismissal of Wang Hao, right?"

Cao Dongming listened and nodded.

"Donggang University dismissed the faculty and staff of the university without investigating carefully, this kind of thing can be done, and the report submitted attributed the problem to Wang Hao, what's the big deal."

"The projects of the Donggang Alloy Laboratory have been interrupted, who cares about that?"

"That's right."

Cao Dongming thought for a moment that this was indeed the truth, and he suddenly became more interested in Wang Hao's analysis work, "Professor Peng, can you take out the data analysis report and take a look?" I have to go through the entire R&D and manufacturing process. ”

"Of course, no problem, please here."

Peng Hui said and took the lead towards the data analysis office.

(Ask for a commuter pass)