0.6Zr3Mo钛合金在含不同浓度盐酸胶凝酸中的腐蚀疲劳行为
Corrosion Fatigue Behavior of 0.6Zr3Mo Titanium Alloy in Gelled Acid withDifferent Concentrations of Hydrochloric Acid
摘 要
通过应力幅550 MPa和应力比-1的疲劳试验，研究了0.6Zr3Mo钛合金在含不同质量分数（1%~20%）盐酸的胶凝酸中的腐蚀疲劳行为。结果表明：随着胶凝酸中盐酸浓度的增加，钛合金的腐蚀疲劳寿命线性降低，且其分散性明显增大；钛合金在含质量分数1%盐酸胶凝酸中的腐蚀疲劳断口形貌与在大气环境中相似，裂纹源为单一裂纹源，裂纹扩展区存在解理面，钛合金发生断裂的主要原因是循环应力作用；当胶凝酸中盐酸质量分数为10%和15%时，裂纹源区存在大量点蚀坑，裂纹呈多源萌生，裂纹扩展区包括解理面、主裂纹以及大量二次裂纹，循环载荷和盐酸的共同作用加速了裂纹扩展，降低了钛合金的腐蚀疲劳寿命；在裂纹扩展区裂纹尖端的局部盐酸浓度差异造成了局部较深的二次裂纹，这是腐蚀疲劳寿命分散性显著的主要原因。
盐酸浓度
胶凝酸
腐蚀疲劳寿命
titanium alloy
hydrochloric acid concentration
gelled acid
corrosion fatigue life
Abstract
The corrosion fatigue behavior of 0.6Zr3Mo titanium alloy in gelled acid with different mass fractions (1%-20%) of hydrochloric acid was studied by fatigue test with stress amplitude of 550 MPa and stress ratio of -1. The results show that the corrosion fatigue life of titanium alloy decreased linearly with increasing hydrochloric acid concentration, and its dispersion increased obviously. The corrosion fatigue fracture morphology of titanium alloy in gellic acid with 1wt% hydrochloric acid was similar to that in atmospheric environment; the crack source was single, and there was cleavage plane in the crack propagation zone; the main reason for fracture of titanium alloy was cyclic stress. When the mass fraction of hydrochloric acid in gellic acid was 10% and 15%, there were a lot of pits in the crack source zone, and the crack initiation was multi-source; the crack propagation zone included cleavage plane, primary cracks and a large number of secondary cracks; the joint action of cyclic load and hydrochloric acid accelerated the crack propagation and reduced the corrosion fatigue life of titanium alloy. In the crack propagation zone, the difference of local hydrochloric acid concentration at the crack tip led to deep secondary cracks, which was the main reason for the significant dispersion of corrosion fatigue life.
中图分类号 TG115.5 DOI 10.11973/jxgccl202207003
所属栏目 试验研究
基金项目 国家自然科学基金资助项目（51901180）；陕西省教育厅青年创新团队建设科研计划项目（21JP096）
收稿日期 2021/8/13
修改稿日期 2022/5/18
网络出版日期
作者单位点击查看
备注黎玉泽(1997-),男,山西运城人,硕士研究生通信作者(导师):魏文澜讲师
引用该论文: LI Yuze,LI Zhen,HE Shilei,WEI Wenlan,JIN Dandan,CUI Lu,CHENG Jiarui. Corrosion Fatigue Behavior of 0.6Zr3Mo Titanium Alloy in Gelled Acid withDifferent Concentrations of Hydrochloric Acid[J]. Materials for mechancial engineering, 2022, 46(7): 11～15
黎玉泽,李臻,何石磊,魏文澜,金丹丹,崔璐,程嘉瑞. 0.6Zr3Mo钛合金在含不同浓度盐酸胶凝酸中的腐蚀疲劳行为[J]. 机械工程材料, 2022, 46(7): 11～15
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【3】叶登胜,任勇,管彬,等. 塔里木盆地异常高温高压井储层改造难点及对策[J].天然气工业,2009,29(3):77-79. YE D S, REN Y,GUAN B,et al.Difficulty and strategy of reservoir stimulation on abnormal-high temperature and high pressure wells in the Tarim basin[J].Natural Gas Industry,2009,29(3):77-79.
【4】朱光有,张水昌,梁英波,等. 四川盆地高含H2S天然气的分布与TSR成因证据[J].地质学报,2006(8):1208-1218. ZHU G Y,ZHANG Y C,LIANG Y B,et al.Distribution of high H2S-bearing natural gas and evidence of TSR origin in the sichuan basin[J].Acta Geologica Sinica,2006(8):1208-1218.
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