fengzhongke 发表于 2010-6-10 20:39:00

alpha case

What is the meaning of "alpha case"?(Alpha Case: Wrought Titanium)

tong 发表于 2010-6-10 22:17:46

From Wikipedia
In metallurgy, alpha case is the oxygen-enriched phase that occurs when titanium and its alloys are exposed to heated air or oxygen. Alpha case is brittle, and tends to create a series of microcracks which will reduce the metal's performance and it's fatigue properties. Alpha case can be avoided by processing in a vacuumed environment, but, due to its costs it is usually eliminated via machining or chemical milling

fengzhongke 发表于 2010-6-30 21:29:44

Thank you!

fengzhongke 发表于 2010-6-30 21:33:05

洛氏硬度的ASTM测试标准，供大家参考！
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