Thermal evolution of vacancy-type defects in quenched FeCrNi alloys
Thermal evolution of vacancy-type defects in quenched FeCrNi alloys
复制标题
淬火 FeCrNi 合金中空位型缺陷的热演化
DOI：
10.1007/s00339-015-9116-1
复制
发表时间：
2015-04
期刊：
影响因子：
--
通讯作者：
Wang, B.Y.
中科院分区：
文献类型：
--
作者：
Lu, E.Y.;Tian, H.W.;Zhang, P.;Wang, B.Y.
用正电子湮没技术研究了等时退火对淬火FeCrNi合金和SUS316中空位型缺陷的影响。空位型缺陷聚集，并随着退火温度的增加而增长，高达523 K，在FeCrNi合金中，随着温度的升高而逐渐消失。湮没温度对Mo和非金属元素的添加相对不敏感，在673 K退火后，空位型缺陷被湮没，位错型缺陷在所有合金中形成。此外，由于Mo空位复合物的形成，Mo稀释的FeCrNi模型合金中的缺陷密度低于FeCrNi模型合金中的缺陷密度。商业不锈钢SUS316中的空位型缺陷的长寿命小于FeCrNi模型合金中的长寿命，这是由于非金属元素引起的缺陷迁移率的变化。此外，空位型和位错型缺陷在整个退火过程中对正电子湮没的SandW参数都有贡献。
The effect of isochronal annealing on vacancy-type defects in quenched FeCrNi alloys and SUS316 was investigated via positron annihilation technique. Vacancy-type defects clustered and grew with increasing annealing temperatures of up to 523 K and, in FeCrNi alloys, were gradually annihilated with increasing temperature. The annihilation temperature was relatively insensitive to the addition of Mo and nonmetal elements, and after annealing at 673 K, the vacancy-type defects were annihilated and dislocation-type defects were formed in all of the alloys. In addition, due to the formation of Mo-vacancy complexes, the density of defects in the Mo-diluted FeCrNi model alloy was lower than that in the FeCrNi model alloy. The long lifetime of vacancy-type defects in commercial stainless steel SUS316 was smaller than that in the FeCrNi model alloys due to the nonmetal-element-induced change in mobility of the defects. Moreover, the vacancy-type and dislocation-type defects contributed to theSandWparameters of positron annihilation during the entire annealing treatment.
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