The fatigue crack growth rate (CGR) of ultra high strength steel 30CrMnSiNi2A in distilledwater at 18,35 and 55℃ were measured.It was confirmed that the temper
The microstrueture in shape memory alloy Cu—14Al—4Ni aged for two years at room temper-ature has been studied,and the substructure slow change has been observ