赵宝达,张琪,张麦仓

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用慢应变速率拉伸实验研究了pH值、SO■、Cl~-对GH4080A合金应力腐蚀行为的影响。结果表明:pH值越低,GH4080A合金的抗应力腐蚀性能越差;合金对中性条件下的Cl~-应力腐蚀敏感性不明显,但pH<7时,合金对Cl~-存在应力腐蚀敏感性,而且对HCl具有明显的应力腐蚀敏感性,主要源于H~+和Cl~-对应力腐蚀的协同作用;常温下GH4080A对含SO■离子的介质不敏感。进一步的外加电位应力腐蚀实验表明,GH4080A合金应力腐蚀断裂机理为氢致开裂型,断口特征表现为沿晶脆性断裂。

关键词(KeyWords)： GH4080A;慢应变速率拉伸;应力腐蚀敏感性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51971016)

作者(Author): 赵宝达,张琪,张麦仓

DOI: 10.13289/j.issn.1009-6264.2019-0283

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