材料科学
焊接
巴黎法
冶金
裂缝闭合
韧性
微观结构
残余应力
复式(建筑)
马氏体
复合材料
断裂力学
遗传学
生物
DNA
作者
M.C. Young,L.W. Tsay,C.S. Shin,S.L.I. Chan
标识
DOI:10.1016/j.ijfatigue.2007.01.004
摘要
The influence of γ content and its morphology on the impact and fatigue crack growth behavior of 2205 duplex stainless steel (DSS) welds were studied in this work. Short time post-heating was able to effectively raise the γ content and the impact toughness of the weld. The variation in microstructures showed less influence on the fatigue crack growth rate (FCGR) of the steel plate and weld except in the low ΔK regime. In contrast, residual welding stresses played a more significant affection on the FCGR of the DSS weld than microstructural factors did. Plastic deformation induced martensitic transformation within a definitely thin layer was responsible for the difference in crack growth behavior between specimens in the low ΔK range. Coarse columnar structure was more likely to have tortuous crack path in comparison with the steel plate.
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