Interplay between temperature-dependent strengthening mechanisms and mechanical stability in high-performance austenitic stainless steels  

作　　者：Mohammad Javad Sohrabi Hamed Mirzadeh Saeed Sadeghpour Milad Zolfipour Aghdam Abdol Reza Geranmayeh Reza Mahmudi 

机构地区：[1]School of Metallurgy and Materials Engineering,College of Engineering,University of Tehran,14395-515 Tehran,Iran [2]Centre for Advanced Steels Research,Materials and Mechanical Engineering,University of Oulu,90014 Oulu,Finland [3]Department of Mechanical Engineering,College of Engineering,University of Tehran,14395-515 Tehran,Iran

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第10期2182-2188,共7页矿物冶金与材料学报（英文版）

基　　金：Saeed Sadeghpour would like to thank Jane,Aatos Erkon säätiö(JAES),and Tiina ja Antti Herlinin säätiö(TAHS)for their financial support on Advanced Steels for Green Planet Project.The authors would also like to greatly thank the members of the“Formability Laboratory”and“Advanced Steels and Thermomechanically Processed Engineering Ma-terials Laboratory”for their help and support。

摘　　要：The effects of deformation temperature on the transformation-induced plasticity(TRIP)-aided 304L,twinning-induced plasti-city(TWIP)-assisted 316L,and highly alloyed stable 904L austenitic stainless steels were compared for the first time to tune the mechan-ical properties,strengthening mechanisms,and strength-ductility synergy.For this purpose,the scanning electron microscopy(SEM),electron backscattered diffraction(EBSD),X-ray diffraction(XRD),tensile testing,work-hardening analysis,and thermodynamics calcu-lations were used.The induced plasticity effects led to a high temperature-dependency of work-hardening behavior in the 304L and 316L stainless steels.As the deformation temperature increased,the metastable 304L stainless steel showed the sequence of TRIP,TWIP,and weakening of the induced plasticity mechanism;while the disappearance of the TWIP effect in the 316L stainless steel was also observed.However,the solid-solution strengthening in the 904L superaustenitic stainless steel maintained the tensile properties over a wide temper-ature range,surpassing the performance of 304L and 316L stainless steels.In this regard,the dependency of the total elongation on the de-formation temperature was less pronounced for the 904L alloy due to the absence of additional plasticity mechanisms.These results re-vealed the importance of solid-solution strengthening and the associated high friction stress for superior mechanical behavior over a wide temperature range.

关 键 词：austenitic stainless steels mechanical behavior stacking fault energy METASTABILITY mechanical twinning 

分 类 号：TG142.71[一般工业技术—材料科学与工程]