SUS 304 鋼の温度 77-1223 K ひずみ速度 10^<-6>-10^<-1>s^<-1> における引張特性

概要

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Strengths (true ultimate tensile strength, etc) and ductilities (uniform strain, etc) of Type 304 stainless steel has been presented for test temperature 77 to 1223K and for strain rate range 10^<-6> to 10^<-1>s^<-1> in liquid (77 to 423K) and gas (air) (203 to 1223K) environments. The behaviours can be divided into two regions at a critical temperature of 400K, Tcr, where strain rate ε^^・has little effect on the properties. Below Tcr, some martensite formation causes a prominient uniform strain peak when ε^^・ is low. The beneficial effect decreases with increasing ε^^・ and diminishes when ε^^・=10^<-1>s^<-1>. Uniform strain in liquid is higher than in gas for any ε^^・. The reasons are explained. Above Tcr, the occurence of two types of dynamic strain aging cause high values of strengths and uniform strain in the range 450K to 800-1000K.
1985-06-25