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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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取向电工钢的低温拉伸变形和断裂行为
Keywords: 金属材料,取向电工钢,拉伸变形,断口形貌,偏聚
Abstract:
？测量了普通取向电工钢室温至300℃的拉伸性能并观察了拉伸断口形貌.对比分析和定量计算表明,随着拉伸温度的升高p原子在晶界偏聚的程度逐渐降低,使得断口形貌的沿晶特征减弱、解理特征增强.拉伸温度超过100℃以后沿晶断裂特征消失,基体的屈服强度逐渐低于解理强度,使得断口形貌解理特征减弱、韧窝特征增强,至190℃转变成完全的韧窝断口.在100℃--160℃范围内拉伸变形时位错滑移会拖曳柯垂尔气团随之迁移,造成了随温度升高延伸率下降,且屈服强度的降幅减缓.
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