高速引張加工されたステンレス鋼の機械的性質

概要

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This investigation has been conducted to make clear the effect of strain rates on the internal structure and the mechanical properties of rapidly stretched stainless steels. The 18%Cr-8%Ni stainless steel and 17%Cr-4%Ni PH stainless steel specimens have been used in this study. The main results obtained are as follows : (1) The yield strength and the tensile strength of these stainless steels in rapid tensile testing are larger than those in static tensile testing. The strain rate gives a remarkable effect on the resistance in deformation of these stainless steels. (2) The yield strength, the tensile strength and the hardness of rapidly pre-stretched 18%Cr-8%Ni stainless steel are larger than those of statically pre-stretched sort. It was recognized that this fact is mainly due more to the promoting martensite transformation by rapid pre-stretching than by static one. (3) The yield strength, the tensile strength and the hardness of statically pre-stretched 17%Cr-4%Ni PH stainless steel are larger than those of rapidly pre-stretched sort. It seems that this fact is mainly due more to the promoting aging by static pre-stretching than by rapid one. (4) From the above mentioned results, it is recognized that the mechanical properties of pre-stretched stainless steels are remarkably affected by the internal structure caused by the strain rate in pre-stretching.
社団法人日本材料学会の論文
1965-10-15