Effects of Temperature and Strain Rate on TRIP Effect in SUS301L Metastable Austenitic Stainless Steel

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概要

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• Effects of temperature and strain rate on tensile properties in metastable austenitic stainless steel SUS301L were studied in order to clarify the conditions of stress-induced martensitic transformation behavior for the maximum uniform elongation through the TRIP effect. The experimental results of the previously studied SUS304 steel were used to compare the conditions of metastable austenitic steels with different austenite stability. In the static tensile tests for the SUS301L steel at temperatures between 123 K and 373 K, the tensile strength increased with decreasing temperature, and uniform elongation reached a maximum at 323 K. The volume fraction of stress-induced martensite (Vα) at the same true strain increased with a decrease in temperature. For the strain-rate dependence on transformation kinetics, Vα decreased at strain rates higher than about 10–2 s–1 due to the temperature rise caused by adiabatic deformation. The equation for stress-induced transformation behavior proposed by Matsumura et al. was modified to consider the saturation value of stress-induced martensite, and the modified equation could describe the transformation kinetics precisely. The conditions of stress-induced transformation for the maximum uniform elongation through the TRIP effect were coincident between the SUS301L and the SUS304 with different austenite stability: the volume fraction of martensite at a true strain of 0.3 is approximately 5% and the maximum transformation rate is almost 2 at a higher true strain near uniform elongation.

• The Iron and Steel Institute of Japanの論文

著者

• Tsuchida Noriyuki

  Graduate School Of Engineering Univ. Of Hyogo

• Tonan Tomoyuki

  Formerly Undergraduate Student, University of Hyogo

• Ueji Rintaro

  Formerly Faculty of Engineering, Kagawa University

• Yamaguchi Yuko

  Formerly Undergraduate Student, University of Hyogo

• Morimoto Yoshiki

  Formerly Graduate Student, University of Hyogo

• Takagi Yoshinori

  Employment and Human Resources Development Organization of Kyoto

関連論文

• Mechanical Properties of Ni-Free High-Nitrogen Austenitic Stainless Steel Made by Metal Injection Molding with Nitrogen Absorption Method
• Stress-Induced Martensitic Transformation Behaviors at Various Temperatures and Their TRIP Effects in SUS304 Metastable Austenitic Stainless Steel
• Description of Stress-strain Curves Based on Thermal Activation Models for a Ti-Fe-0 Alloy at 77 to 296 K with Strain Rates from 10^ to 10^sec^
• Effects of Temperature and Strain Rate on Stress-Strain Curves for Dual-Phase Steels and Their Calculations by Using the Kocks-Mecking Model
• Effects of Temperature and Strain Rate on TRIP Effect in SUS301L Metastable Austenitic Stainless Steel

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