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金属学报  2015 

合金元素Hf,Sn,Ta,Zr,Dy和Ho对Nb-Nb5Si3合金组织和力学性能的影响*

DOI: 10.11900/0412.1961.2014.00477, PP. 815-827

Keywords: Nb5Si3,合金元素,组织,力学性能

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Abstract:

综合评述了作者几年来先后完成的Hf含量对Ni-16Si,Hf和Sn对Ni-20Ti-5Cr-3Al-18Si,Zr含量对Ni-22Ti-16Si,Ta含量对Nb-22Ti-16Si-7Cr-3Al和稀土元素Dy和Ho对Ni-23Ti-10Ta-2Cr-18Si和Ni-22Ti-16Si-7Cr-3Al-3Ta-2Hf等合金组织结构和力学性能影响的研究工作.合金元素Hf,Zr,Sn+Hf,Ta,Dy和Ho加入Nb-Si二元系或多元系合金,明显提高其室温和高温屈服强度和塑性以及断裂韧性.强度的提高与合金元素的固溶强化有关,塑性、韧性的改善与组织的细化和超过临界尺寸的固溶体(Nb,Ti)ss颗粒增多等因素有关.

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