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OALib Journal期刊
ISSN: 2333-9721
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变形温度对应变强化深冷容器用s30408不锈钢组织结构演化的影响*
Keywords: 金属材料,奥氏体不锈钢,深冷容器,应变强化,变形温度,相变
Abstract:
？对经9%预变形、在不同低温条件下拉伸变形后的深冷容器用应变强化s30408奥氏体不锈钢进行一系列的微观组织结构表征,研究了变形温度对其组织结构演变的影响。结果表明:9%预变形后在1.0×10-3/s应变速率下在-60℃和-196℃的拉伸变形促进了s30408不锈钢发生从γ奥氏体向α'-马氏体的转变,拉伸温度越低转变量越多、板条越细;同时,随着拉伸温度的降低s30408不锈钢的显微硬度值升高。低温拉伸形变诱发s30408奥氏体不锈钢马氏体相变,其α'-马氏体与基体γ奥氏体的位向关系为{111}γ∥{011}α',<101>γ∥<111>α',符合k-s关系。
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