Gang Wang , Mian Wang , Xinjun Zhang , Yang Tong , Lunsu Liang , Guangtao Xu , Minghao Zhao , Lingxiao Li
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引用次数: 0
Abstract
The in situ hydrogen embrittlement (HE) behaviour and mechanism of ultrasonic surface rolling (USR)-induced surface gradient structured materials under alternating stresses were investigated. The results showed that hydrogen-induced amorphous phenomenon occurs in H-charging fatigue specimens, which leads to hydrogen-assisted crack initiation, the increase of displacement amplitude (DA) values and the decrease of fatigue life. The combined effect of surface roughness reduction, grain refinement and residual compressive stress induced by the application of USR treatment to the materials reduced the hydrogen adsorption capacity, hindered hydrogen diffusion, and alleviated hydrogen-induced cracks.
期刊介绍：
Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.
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