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OALib Journal期刊
ISSN: 2333-9721
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难变形镍铬钴基高温合金中σ相对合金力学性能的影响
, PP. 284-337
Abstract:
研究结果表明,难变形镍铬钴基高温合金,在长期时效中,微量和少量σ相的析出,对合金的力学性能没有明显的影响;析出多量σ相,则显著降低合金的室温拉伸、冲击韧性、持久、蠕变和断裂韧性,此时材料的断裂沿σ相界面发展。但对高温拉伸性能没有影响。σ相在室温是一种硬而脆的相,在较高温度时显示了一定塑性,可以发生较大变形。
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