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首页> 外文期刊>ISIJ international >Stress-Induced Martensitic Transformation Behaviors at Various Temperatures and Their TRIP Effects in SUS304 Metastable Austenitic Stainless Steel
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Stress-Induced Martensitic Transformation Behaviors at Various Temperatures and Their TRIP Effects in SUS304 Metastable Austenitic Stainless Steel

机译：SUS304亚稳奥氏体不锈钢在不同温度下的应力诱发马氏体转变行为及其TRIP效应

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摘要

The effect of temperature on the static tensile properties of the metastable austenitic steel JIS-SUS304 was investigated to clarify the conditions of stress-induced martensitic transformation behavior for maximum uniform elongation. Results of the static tensile tests showed that the tensile strength increased with decreasing temperature and that uniform elongation reached a maximum value at 308 K. The inverse temperature dependence of 0.2% proof stress was observed below 243 K. The volume fraction of martensite increased with decreasing deformation temperature. The conditions under which the stress-induced transformation resulted in the maximum uniform elongation due to the transformation-induced plasticity (TRIP) effect in SUS304 steel were summarized in terms of the martensite volume fraction and rate of transformation. The martensite volume fraction at true strain, which indicates the maximum transformation rate, was found to be approximately 35% independent of the deformation temperature. In stress–strain relationships for which the maximum uniform elongation was obtained, both the evolution rate of the dislocation density and the work-hardening continued to increase until near-uniform elongation was observed, and the maximum calculated value of work-hardening was almost 20 MPa/%.
机译：研究了温度对亚稳奥氏体钢JIS-SUS304静态拉伸性能的影响，以阐明应力诱导的马氏体相变行为以实现最大均匀伸长率的条件。静态拉伸试验的结果表明，拉伸强度随温度降低而增加，并且均匀伸长率在308 K时达到最大值。在243 K以下观察到逆温度依赖性为0.2％屈服应力。马氏体的体积分数随温度降低而增加变形温度。根据马氏体体积分数和相变速率，总结了SUS304钢中因相变诱导塑性（TRIP）效应而导致应力相变导致最大均匀伸长的条件。发现在真实应变下的马氏体体积分数表示最大的转化率，与变形温度无关，约为35％。在获得最大均匀伸长率的应力-应变关系中，位错密度和加工硬化的演化速率都持续增加，直到观察到接近均匀的伸长率为止，加工硬化的最大计算值几乎为20 MPa /％。

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