氢对TC4钛合金电子束焊接头疲劳裂纹扩展速率的影响OA北大核心CSCDCSTPCD
Effects of Hydrogen on Fatigue Crack Propagation Rate of TC4 Alloy Electron Beam Welded Joint
采用充氢CT试样对TC4钛合金电子束焊接头的室温疲劳裂纹扩展速率进行了测定,并对试样断口和接头各区显微组织进行了观察.试验结果表明:充氢母材试样在低速扩展区和失稳扩展区的da/dN相对于未充氢试样有明显的提高,但不同氢含量之间差别不大,在稳态扩展区(Paris区),氢对da/dN的影响很小.充氢焊缝试样在整个裂纹扩展过程中的da/dN明显提高,且随着氢含量的增加而增加.断口分析结果表明氢的加入使得材料脆性增大,促进了裂纹的扩展.在Paris区,组…查看全部>>
The hydrogenated CT specimens were adopted to measure the fatigue crack propagation rate (da/dN) of TC4 alloy electron beam welded joints at room temperature, and the fracture surface morphologies of specimens as well as the microstructures of joints were observed. The results indicated that the da/dN of hydrogenated base metal specimens were higher than the non-hydrogenated ones in near-threshold stage and rapid rupture stage, but the specimens with various…查看全部>>
刘鹏涛;赵秀娟;刘昕;齐健;陈春焕;王亚军;任瑞铭
大连交通大学,材料科学与工程学院,辽宁,大连,116028大连交通大学,材料科学与工程学院,辽宁,大连,116028北京航空制造工程研究所,北京,100024大连交通大学,材料科学与工程学院,辽宁,大连,116028大连交通大学,材料科学与工程学院,辽宁,大连,116028北京航空制造工程研究所,北京,100024大连交通大学,材料科学与工程学院,辽宁,大连,116028
金属材料
氢TC4钛合金电子束焊疲劳裂纹扩展速率断口
hydrogen TC4 alloy electron beam welding fatigue crack propagation ratefracture morphology
《航空材料学报》 2011 (3)
52-55,4
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