オーステナイト系ステンレス鋼SUS316Lの引張試験におけるマルテンサイト変態に及ぼす水素の影響

抄録

In order to investigate effects of hydrogen on strain-induced martensitic transformation of austenitic stainless steel JIS-SUS316L in tensile tests, the relationship between plastic strain and the amount of strain-induced martensitic was measured using hydrogen-charged and uncharged specimens by X-ray diffraction analysis. The experimental result of the quantitative analysis by the RIR method showed that 0 % pre-strained hydrogen-charged specimen had more martensite than 0 % pre-strained uncharged within plastic strain 5 %. However, the 0 % pre-strained uncharged specimens had more martensite than 0 % pre-strained hydrogen-charged for ε_p=5 %～60.4 %.10 % pre-strained uncharged specimen had more martensite than 10 % pre-strained hydrogen-charged specimen. The X-ray profiles show that the martensitic α' (110) and ε(101) peaks of 0 % pre-strained hydrogen-charged specimen were stronger than those of 0 % pre-strained uncharged specimen. The austenite γ(200) peak of 10 % pre-strained hydrogen-charged specimen was significantly strong.