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dynamic strain aging
met.
动态应变时效
(【技】第二次拉伸时的屈服强度随第一次拉伸卸载后的停留时间延长而增加的现象。如体心立方金属在拉伸至塑性变形后卸载,停留一段时间后又拉伸,则第二次拉伸时的屈服强度和卸载后的停留时间有关。停留时间短则强度低,而且没有明显的屈服点。停留时间长则强度高,而且具有明显屈服点。性能的变化发生在变形之后的过程叫做静态应变时效;性能变化与塑性应变同时发生时,这种过程叫做动态应变时效。)
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