The flow stress of 7A60 ultra high strength aluminum alloy was studied by isothermal compress test at constant strain rate.
采用等温恒应变速率压缩试验对7A60超高强度铝合金的流动应力进行了研究。
2
The grouping test method at four constantstress levels was applied for short life span areas while the stress up and down test method were used for long life span areas.
短寿命区采用四级恒定应力水平的成组试验法，长寿命区采用应力升降试验法。
3
This paper elaborates the stress relaxation performance of various asphalt mixtures with constant loading speed bending test.