Q-Eng

材料学の問題なので難しいと思いますが、
問題をアップします。

Who am I?
I am a characteristic of things.
When people pull things,
stress be added to the things by my figure.
My relationship to stress is σ=Eε.
σ means stress, E means me and
ε means strain.
I am found by Young and I am a modulus.
So I am named.

Young's modulus ヤング率、縦段数係数

Who am I?
I am a kind of carbide.
I am mainly made of carbide of tungsten.
When people make me, they uses special method
called power‐metallurgy processing
because of base metals' high melting point.
Some people don't distinguish me from superalloy.
I'm not "chogokin" in Japanese,
superalloy is real "chogokin".
I am used for tool metals.

cemented carbide 超硬合金

Who am I?
I am a kind of metal.
I have a high rustproof characteristic.
I have two phases, ferrite and austenite.
I have ferrite so I have magnetism.
I contain Cr and low Ni.
Because of low Ni contain,
I'm cheaper than usual SUS304.
But low Ni caused σ brittleness.
For the reason,I am bery difficult
to make and to repair.
To avoid σ brittleness,
I am repaired by welding with cooling.

duplex stainless 2相ステンレス