Abstract As-hardened (fully martensitic) and as-tempered (with 14 ± 2% reversed austenite in a martensitic matrix) samples were subjected to cavitation testing in order to characterize the behavior of the reversed austenite and understand how it influences the CA-6NM steel cavitation behavior. Results showed similar nominal incubation periods of 3 h for both the studied conditions. For the first time, it is shown that the as-tempered CA-6NM steel incubation stage can be divided in two distinct parts: i) the IP I, period mainly related to γREV→α′ strain-induced transformation; and IP II, period mainly related to α′ deformation. It was concluded that the reversed austenite plays important role in the incubation stage of the CA-6NM steel, delaying the expected start of the cavitation erosion.

中文翻译：

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空化作用下 CA-6NM 马氏体不锈钢中逆奥氏体的行为

摘要 对淬火（完全马氏体）和回火（马氏体基体中含有 14 ± 2% 的反转奥氏体）样品进行空化测试，以表征反转奥氏体的行为并了解它如何影响 CA-6NM钢空化行为。结果显示两种研究条件的标称潜伏期相似，均为 3 小时。首次表明，回火状态的 CA-6NM 钢孵化阶段可以分为两个不同的部分：i) IP I，主要与 γREV→α' 应变诱导相变有关的时期；和IP II，周期主要与α'变形有关。得出的结论是，逆奥氏体在 CA-6NM 钢的孵化阶段起着重要作用，延迟了预期的空蚀开始。