was troubled by the people in the library, Chen Zhou was naturally embarrassed to talk to Yang Yiyi again.

With a light cough, he turned his attention back to the data in front of him.

With Yang Yiyi's previous preparations, Chen Zhou's time spent on the surface modification of strong pulse ion beams has been directly reduced by more than half.

He only needs to follow the normal general process and add a little bit of his own thinking, and he can quickly process the data.

[The main reason for the formation of melt pits on the surface of the modified material is that the subsurface layer of 30SiMn3MoVA steel is first heated and heated under the action of a high-pulse ion beam, resulting in the first dissolution and eruption of low melting point positions such as carbides, grain boundaries, and crystallographic defects containing thermophysical differences between the surface layer and the matrix, and finally the formation of a melt pit on the surface of the material. 】

While reading this passage, Chen Zhou's mind quickly flashed through the relevant experimental data, as well as the surface microstructure and cross-sectional microstructure photos under the scanning electron microscope.

"For the morphological characteristics of the surface treatment of the strong pulse ion beam, it is because under the action of the strong pulse ion beam, the surface layer of the material instantly accumulates high energy, and after the process of rapid heating, melting and cooling, the stress field ......"

"As a result, the surface of the material undergoes rapid and violent plastic deformation, resulting in the morphology we see today. ”

Chen Zhou thought for a moment, opened the scanned photo sent by Dean Yang and took a look.

Immediately, Chen Zhou compared the experimental data again and nodded slowly.

"When a strong pulsed ion beam bombards the surface of a material, its energy is converted into heat in a very short time, which melts the surface of the material and then cools it rapidly. ”

"Under such conditions, the formation of carbides on the surface of the material and the precipitation of the second phase will be inhibited, and eventually the surface grain will be refined and a remelting layer will be formed, and the thicker the remelt layer, the higher the surface hardness of the material. ”

"Comparing the various process parameters, the experimental results were within the expected range as the number of pulses increased. ”

"In this case, the part about the surface microstructure can be skipped and moved on to the next step. ”

The next step in Chen Zhou's mind is the analysis of corrosion resistance.

A good piece of steel not only needs to be hard enough, but also able to withstand corrosion!

According to the expected setting, Chen Zhou began to integrate the data.

The potential polarization curves of 30SiMn3MoVA steel before and after intense pulse ion beam treatment were compared and analyzed.

At the same time, the Tafel extrapolation method was used to fit the corrosion potential and corrosion current obtained by fitting the kinetic potential polarization curve with the number of pulses, and the list of fitting parameters was obtained.

Charts are the most intuitive representation of data and an essential part of processing data.

After a glance, Chen Zhou only felt bored.

This kind of data processing, which is all expected, is really unpretentious and unpretentious.

Inadvertently, she glanced at Yang Yiyi again, and saw that this girl was looking at the literature in front of her intently.

Chen Zhou glanced at what Yang Yiyi saw, ah, this girl is walking in front of him again.

With a slight smile, Chen Zhou turned his head to look at the chart on the computer, and the speed in his hand began to speed up.

You have to finish processing the data quickly and catch up with Mr. Xiao Yang as soon as possible!

The graph shows that the corrosion potential Ecorr after treatment with high pulsed ion beam has different degrees of positive shift compared to the original sample.

This indicates that the corrosion tendency of the treated specimen is reduced.

The parameters fitted by the Tafel extrapolation method also show that the corrosion current density Icorr of the sample becomes smaller after the high pulsed ion beam treatment.

This indicates that after the treatment of the sample, its corrosion rate decreases.

On the scratch paper, Chen Zhou began to write:

[The corrosion potential increases and the corrosion current density decreases, and the corrosion resistance of the sample after pulse treatment on the surface is enhanced, with the highest corrosion potential of -641mV, the lowest corrosion tendency, and the minimum corrosion current of 6.91×10^-4mA/cm??] , the corrosion rate is minimal, and the corrosion current is reduced compared to the original specimen. 】

[The results of data analysis showed that the sample after 30 pulse treatment had the best corrosion resistance.] 】

This is the conclusion of the data analysis obtained under the conditions of the first set of process parameters.

After finishing one group, Chen Zhou rushed to the next set of experimental data.

Same approach, same thinking.

As time passed, the scratch paper in front of Chen Zhou gradually piled up, and the unprocessed data became less and less.

Finally, Chen Zhou breathed a long sigh of relief.

"The general law is also out. ”

Replacing it with a new piece of scratch paper, Chen Zhou habitually clicked twice before he began to write about this rule.

[After the high-pulse ion beam treatment, the corrosion resistance of the sample is improved, but it does not improve with the increase of the number of pulses, and it has a certain degree of repeatability.] 】

Looking at the text he had written, Chen Zhou thought about it and continued to write.

[The first set of process parameters can be re-tested in the range of 30 to 33 pulses; the second set of process parameters ......]

This is Chen Zhou's suggestion, and it is also a small adjustment that he can make.

This is also Chen Zhou's attitude towards experiments.

Of course, this is not the data given by Chen Zhou.

Rather, in the processing of experimental data, it is incidentally adjusted and speculated.

The improvement of the corrosion resistance of 30SiMn3MoVA steel is the result of the combined effect of grain refinement and the increase of residual austenite content in the surface layer of the sample after pulse treatment.

This austenite, which is actually γ-Fe, is produced after the high-pulse ion beam treatment changes the surface structure of the sample.

At the same time, the remelting layer formed by high-pulse ion beam treatment is not only hard, but also corrosion-resistant.

The combined effect of these changes improves the corrosion resistance of the sample surface.

Thinking of this, Chen Zhou wrote the reason he gave next to the experimental adjustment parameters given.

【...... Within a certain range of pulses, the thickness of the remelted layer will increase to a certain extent with the increase of the number of pulses, which will improve the corrosion resistance of the material. 】

After doing this, Chen Zhou's expression was relieved: "The data is finally done!"

Opening a new page of the word document on the computer, Chen Zhou began to sort out the results of the data processing.

In a short time, the file is compressed, sent by email, and it's done!

Next, it's time for the experiment.

Chen Zhou stretched his waist and was ready to see how Yang Yiyi was studying.

Unexpectedly, as soon as he turned his head, he saw Yang Yiyi looking at him with a smile.

Chen Zhou was suddenly embarrassed, and then his little face raised: "The handsomeness on my face has attracted you?"

Yang Yiyi didn't speak, but just made an "evil" expression.

Chen Zhou just wanted to raise his hand, but Yang Yiyi grabbed his arm first.

There is no way, the meat is in the hands of people, hurry up and beg for mercy.

As Chen Zhou thought, after receiving the results of the experimental data, Dean Yang immediately arranged a new experiment.

The experiment was carried out in an orderly manner, and Chen Zhou's life was also very fulfilling.

But what Chen Zhou didn't know was that somewhere was "noisy" because of him.

And the reason for the "quarrel" is also very simple, the joint recommendation letters of several academicians are in place.