李冬升,凌瀚宇,王威,刘勇,刘仁才

• 1:江苏大学材料科学与工程学院

摘要(Abstract)：

采用慢速应变速率应力腐蚀试验研究了高盐环境对IN740H镍基高温合金应力腐蚀行为的影响。结果表明：在近中性3 mol/L NaCl溶液和酸性2.5 mol/L NaCl+0.5 mol/L HCl溶液中，IN740H镍基高温合金的应力腐蚀敏感性系数均小于25%,没有发生应力腐蚀，仅存在一定的应力腐蚀断裂倾向；合金在酸性2.5 mol/L NaCl+0.5 mol/L HCl溶液中表现出最高的应力腐蚀敏感性，并且慢应变速率拉伸(SSRT)断口表现为脆性和韧性断裂的混合断裂方式，说明IN740H镍基高温合金在高盐环境下仍有较好的抗应力腐蚀性能。

关键词(KeyWords)： IN740H镍基高温合金;NaCl;HCl;慢应变速率;应力腐蚀

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李冬升,凌瀚宇,王威,刘勇,刘仁才

DOI: 10.13289/j.issn.1009-6264.2022-0387

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