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金属学报  2013 

新型无Re镍基单晶高温合金探索研究

DOI: 10.3724/SP.J.1037.2013.00539, PP. 1467-1472

Keywords: 镍基单晶高温合金,成分设计,组织特征,拉伸性能

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Abstract:

综合运用电子空位理论和d-电子理论,设计了一种新型无Re镍基单晶高温合金7.5Cr-5Co-2Mo-6.1Al-8W-6.5Ta-0.15Hf-0.05C-0.004B-0.015Y(质量分数,%),Ni余量.采用光学显微镜、扫描电镜、X射线能谱观察了其铸态、固溶处理和时效处理后的组织特征,研究了完全热处理后合金的760℃拉伸力学行为及断口形貌.结果表明,合金的组织稳定,合金元素间共价键平均结合强度Bot,γ′相固溶温度Tγ′solvus,成分性能预测参数P,抗拉强度σb等与第2代含Re镍基单晶高温合金相当.

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