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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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ti/al比对镍基定向高温合金组织和性能的影响
Keywords: 金属材料,镍基定向高温合金,ti/al比,微观组织,持久性能
Abstract:
？用金相显微镜和扫描电镜对镍基定向高温合金铸态及热处理态的组织进行观察和分析,用透射电镜的eds对合金元素在γ和γ'两相中的分配比进行测试和分析,研究了在al+ti质量总和相同条件下,ti/al比对其微观组织及持久性能的影响。结果表明:随着ti/al比的增加,合金铸态组织中共晶含量显著增加,共晶周围有η相生成；合金初熔温度降低；相同热处理条件下,？γ'相的尺寸增加,立方度降低；合金持久性能变化不大。
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