本文依据动载下应力应变分析模型,采用两种形态的双相组织(F+M)进行试验和计算。裂纹优先在岛状组织基体内产生、条状组织中强化相优先启裂,以及微裂纹的萌生周期等试验结果与计算基本吻合。
On the basis of stress-strain analysis under cyclic loading, the mechanism, origin and cyclic number of micro-crack nucleation of duplex structure materials, saying ferrite plus martensite, have been experimentally studied and calculated.Both results are in fair mutual agreement. The morphology, distribution, size and relative quantities of the constitutional phase, especially strengthening phase, as well as the stress-strain distribution and variation in the micro-region are directly influential in the origin of micro-crack in duplex structure materials.
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