"Regarding the material of the armor, it must be very hard, so as to be able to block external damage, in addition to this, when you are flying at high altitude, you also need to be able to resist low temperatures, otherwise, not to mention whether the user inside will be frozen, once the armor freezes, there is no power, and it can only be thrown into a meat pie from a high altitude."

In the original book, Stark's Mark II battle armor, that is, the iced silver-gray battle armor, when challenging the F-22 flight altitude, froze at high altitude, and the power plant of the battle armor on the soles of his feet failed, and Stark was almost killed.

Zhang Yang continued to guide Stark, who thought for a moment and dragged a large wooden box from the other side, constantly rummaging through it.

"Pure steel is definitely not good, you need to mix other metals, there are many light ones, and there are many hard ones, but the combination of the two must also resist low temperatures, this ......"

Watching Stark rummage through the large box, Zhang Yang glanced at it, and under the table next to him, a metal block with blue-red paint was padded under the table by Tony.

He walked over and lifted the table, not noticing, Tony was a little surprised to see Zhang Yang's movements.

Zhang Yang pulled out the metal from under the table leg, but found that it was a half-finished shield with red-blue paint on it, and Zhang Yang's hand holding the shield trembled slightly.

"Is it Edelman?"

The appearance of this shield is clearly the shield used by Captain America, made of the hardest substance on earth, Edelman alloy, which cannot be broken by Thor's hammer, and can also reflect lasers.

"Huh?"

Stark walked over, saw the half-finished product, and explained.

"What Edelman? This shield is a semi-finished product made of titanium alloy by my father, and it is only a sample, as if the only finished product was given away by him. ”

A wave of disappointment welled up in Zhang Yang's heart.

"It turned out to be titanium, how good would it be if it was an Edelman alloy?"

In the superheroes of Marvel Comics, Captain America's shield and Wolverine's claws are made of Erdman alloy, a metal that is harder than any material that the periodic table on Earth does not have.

Stark's father, Howard Stark, was a figure from the same time as Captain America, and Howard made a shield out of Edman metal and gave it to Captain America.

Zhang Yang has always been a little strange, Howard doesn't seem to tell Stark about this metal, maybe because the government requires secrecy, maybe because there are no samples, in short, Zhang Yang used to be very entangled in this problem, titanium alloy is much worse than Edelman alloy, but it is already very expensive.

"What do you think of using titanium alloy for armor?"

Stark looked at Zhang Yang: "Titanium alloy is very hard and relatively lightweight, but it doesn't seem to be able to resist low temperatures. ”

Zhang Yang thought for a while.

"Then continue to look for, in addition to resisting low temperatures, but also resisting high temperatures, when flying at high speeds, the surface of the armor and the air rub rapidly, which will release extremely high temperatures, and the people inside are likely to be roasted, in addition to these, shock absorption, oxygen capacity, are very important"

"I remember that the Sith Corporation's Angel tactical satellite used a higher grade of gold-titanium alloy, which has a high melting point and can withstand low temperatures."

"Not a bad idea."

"Jarvis, help me contact the Sith Company, order surface metal, to use the gold-titanium alloy of the Angel Tactical Satellite, I need to ensure the power-to-weight ratio, this can also enhance the strength of the battle armor."

"What should the improved Warframe be called?"

"Mark II, this drawing is the drawing of Mark Generation, and it is also the prototype."

Zhang Yang and Stark were discussing when a blonde woman came over with two cups of coffee, she should be Stark's other half, Pepper Pep.

“thanks。”

Zhang Yang picked up a cup of coffee and took a sip, feeling very fragrant, revealing a bitterness, without the mushy taste of roasted coffee beans.

"Great coffee."

Pep is the second person to have access to this basement besides Stark, and the third person to have access is probably Colonel Roddy.

"Tony, here's your schedule for tomorrow, I think you need to take a look."

Pep pulled out a form full of Stark's itinerary, Pep was Stark's secretary and was in charge of his work and life arrangements.

"You made an appointment with Colonel Roddy, and you're going to get to Santa Monica Airport tomorrow morning."

"Pep, you know you don't like to see this."

Stark doesn't like his life being overcrowded, and often complains about these arrangements and makes excuses to procrastinate.

After Pep left, Zhang Yang remembered that Stark was going to Baghlan Air Force Base in Afghanistan tomorrow, where he was attacked and created Iron Man, Zhang Yang didn't know how to stop Stark, he thought about it.

"Stark, I'll give you something."

In Zhang Yang's hand, a black scarab beetle appeared, watching the scarab appear out of thin air, Stark was stunned for a moment, and then looked at Zhang Yang deeply.

"Zhang Yang, you surprised me."

Stark fiddled with the scarab beetle and wondered, "What is this?" ”

"The scarab, a carnivorous beetle, can live for years."

Hearing Zhang Yang's explanation, Stark silently retracted his hand and glared at Zhang Yang.

"Such a carnivorous insect, you actually gave it to me?"

"Don't worry, this insect is summoned by me, it won't bite people casually, give it to you because he can connect with my spiritual power, you need to find me to talk directly to it, I don't have a phone, I don't have any contact information, only this."

Zhang Yang asked Xiaoya, if he has been providing spiritual power to this scarab, the scarab will not disappear after 4 hours, in order to know Stark's location after being attacked, Zhang Yang decided to give Stark a scarab to use as a coordinate.

Going to Afghanistan was an invitation from the U.S. military, and it was impossible to stop Stark, but it would make Stark suspicious, so he simply went with the flow and found another way to save Stark.

"If you suspect that I'm spying on you, you can hold it in a box like lead, and mental power can't penetrate the lead. When you contact me, you can open the lead box, but you need to bring it with you. ”

Seeing Zhang Yang's appearance, Stark finally hesitated, then took it, found a small lead box, and put it in.

"Okay, I got it."

Zhang Yang tried to use his spiritual power to sense the scarab, but found that he was blocked by the lead box, and the substance of lead can indeed block the investigation of spiritual power.

The discussion about the second-generation battle armor lasted until 12 o'clock, and Stark could only go back to rest obediently at Pep's insistence, and Zhang Yang also consciously left the basement and did not stay inside. Because Zhang Yang only had a pitiful $70 left on him, Zhang Yang stayed at Stark's house, ready to talk about it tonight.

Stark's home is very spacious, the whole family is all automatic, controlled by the intelligent system of Jarvis, Zhang Yang took a shower, lay on the bed, and slept comfortably. This sleep went straight to 9 o'clock the next day, and when Zhang Yang woke up, Jarvis automatically controlled the curtains to open, revealing the sea view outside, which was very beautiful.

"What a luxury."

Zhang Yang washed up and got up, and didn't see Pep and the others, and set up breakfast on the table, and Jarvis's voice sounded in the room.

"Mr. Zhang Yang, good morning, Mr. Stark and Pep went to Santa Monica Airport and are expected to be back tomorrow, during which you can leave on your own."

Zhang Yang suddenly thought about teasing Jarvis.

"Can't I leave if I don't leave, I'm in the house, can you still kick me out?"

"Mr. Zhang Yang, of course I didn't drive you away, this is your freedom."

Zhang Yang ate breakfast, toast, milk, eggs, all of which were takeaway called by Jarvis and delivered directly from the breakfast shop.

At this time, the doorbell rang a few times, Zhang Yang walked to open the door, and a man in a black suit saw Zhang Yang and showed him a certificate.

"I'm S.H.I.E.L.D. agent, Phil Coulson, and this is my ID."

S.H.I.E.L.D.?

Zhang Yang is a little strange, what does this have to do with him?

"We suspect that you have extraordinary abilities and may endanger national security, so please come with us."