The growth and disappearance of induced martensite plates under bending stress have been also directly observed by the optical microscope.
用光学显微镜直接观察了合金在弯曲时应力诱发马氏体的增长和消失过程。
2
It is concluded that, the residual stressinduced by cold expansion can maintain enough strength to prevent and retard fatigue crack initiation and growth in rail bolt hole.