本文研究了1Cr18Ni9Ti在固溶态及预形变状态的微塑性变形规律和机理。在微塑性变形的不同阶段中,Ⅰ阶段对应晶界附近区域位错的运动与耗竭;Ⅱ阶段对应于晶粒内部位错全面开动与增殖并有晶界发射位错,相当于宏观变形的初始阶段。预变形对1Cr18Ni8Ti的宏观屈服强度σ_0.2与微屈服强度σ_(mys)(1~(-6))具有不同的影响规律。
The regularity and mechanism of the microplastic deformation of1Cr18Ni9Ti stainless steel both solution-treated and prestrained were investigated.In the different steges of microplastic deformation, stage Ⅰ corresponds to the dis-location moving and exhausting in the regions near grain boundaries, Stage Ⅱ, be-ing the early stage of macroplastic deformation, corresponds to the extensive opera-tion and generation of dislocations in the interior of grains and also dislocationemission from grain boundary. The regularities of effect of prestrain on macro-and micro-yield strength are different.
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