However, the coarsened and less dispersive Ti〓Ni〓 precipitates do not affect the morphology of the R phase and provide the preferred nucleation sites for the martensite, but they prevent the martensite from its auto-catalytic nucleation and growth and, consequently, the martensite develops discontinuously in a clustering nature.

低彌散度的粗片狀Ti〓Ni〓相不影響R相的形貌，而且為馬氏體相變提供優(yōu)先形核部位求一级黄色网站，同時又制約馬氏體的自促發(fā)成核和生長欧美湿身诱惑超碰在线，以致使馬氏體呈群團(tuán)狀的區(qū)域式不連續(xù)發(fā)展。

The coarsened structure perpendicular to primary crack plane exhibits better propagation resistance than that parallel with primary crack plane, but it seems that crack propagation property at high temperature can not be improved by changing γ′precipitates morphology.

顆粒形態(tài)不會改變裂紋擴(kuò)展路徑及微觀機(jī)制2019偷拍黄色视频精品，粗化結(jié)構(gòu)的疲勞裂紋擴(kuò)展阻力隨溫度升高而降低的趨勢比原始結(jié)構(gòu)劇烈色哟哟精品入口，同時與主裂紋面垂直的粗化結(jié)構(gòu)具有比與主裂紋面平行的粗化結(jié)構(gòu)更好的疲勞裂紋擴(kuò)展抗力，但通過改變γ′形態(tài)似乎不能改善高溫下裂紋擴(kuò)展性能1024国产视频精品欧美一区。