材料科学
开裂
金属间化合物
冶金
热疲劳
动火作业
同种类的
断裂力学
压铸
涂层
解耦(概率)
复合材料
铸造
热的
工具钢
合金
热力学
物理
工程类
控制工程
气象学
作者
Mehdi Salem,Sabine Le Roux,Gilles Dour,Pascal Lamesle,Karim Choquet,Farhad Rézaï-Aria
标识
DOI:10.1016/j.ijfatigue.2018.09.018
摘要
The interaction between thermal fatigue and aluminizing and/or oxidation is investigated using an experimental approach based on decoupling of mechanisms. Virgin and pre-aluminized steel specimens are tested in air and nitrogen between 100 and 650 °C. Homogeneous uniaxial micro-crack network forms on the oxidised or pre-aluminized surface in air, with a better resistance to micro-cracking for the intermetallic coating. The propagation of the micro-cracks is delayed in nitrogen, whilst no evidence of micro-cracking is observed on the virgin specimen. The premature cracking of the steel depends on the formation of the superficial micro-crack network, and the crack propagation is assisted by oxidation.
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