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Ti/Al合金化對U-5.5Mo合金組織與力學性能的影響
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1.中國工程物理研究院材料研究所;2.西北工業(yè)大學材料學院

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國家重點研發(fā)計劃(項目號2016YFB0701201)


Effect of Ti / Al Alloying on Microstructure and Mechanical Properties of U-5.5Mo Alloy
Author:
Affiliation:

1.Institute of Materials, China Academy of Engineering Physics;2.School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an;3.Institute of Materials,China Academy of Engineering Physics

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    摘要:

    采用感應熔煉法在U-5.5Mo合金中引入Ti/Al元素,通過淬火與時效熱處理來調控材料的組織與性能,獲得不同熱處理狀態(tài)下的U-Mo-Ti/Al合金的微結構與性能。并分析析出相的組成、分布與性能的關系,探討Ti/Al合金元素對U-5.5Mo合金力學性能的調控機制。發(fā)現(xiàn)在U-5.5Mo合金中加入微量Ti元素對U-Mo合金有明顯固溶強化效果,使合金強度大幅提升；低溫時效熱處理可大幅提升U-Mo-Ti三元合金的力學性能；添加微量Al元素,促使U-Mo-Ti-Al四元合金中形成高溫穩(wěn)定的富鈦與富鋁的多元復合金屬間化合物,其在基體與晶界上呈大量不規(guī)則連續(xù)分布,對合金具有顯著沉淀強化效果,使U-Mo-Ti-Al四元合金的強度大幅提升,而塑性幾乎降為零。

    Abstract:

    An experimental set-up was designed for measuring the self-field losses of Bi2223/Ag HTS tapes using a transport current method. Ti/Al was introduced into U-5.5Mo alloy by induction melting, and a new alloy U-Mo-Ti/Al is obtained in this way, its microstructures and properties are controlled by quenching and heat treatment of aging. The relationship between the composition, distribution and properties of precipitates was analyzed, the effect of Ti/Al alloy elements on the mechanical properties of U-5.5Mo alloy was investigated as well. It is found that added trace element Ti has obvious effect of solution strengthening on the alloy of U-5.5Mo. The mechanical properties of U-Mo-Ti ternary alloy can be greatly improved by low temperature aging. It can promote the formation of stable multi-component intermetallic compounds rich in titanium and aluminum in U-Mo-Ti-Al quaternary alloy under high temperature by adding trace element Al, multitudes of irregular continuous distribution of the trace element in the matrix and grain boundary have significant precipitation strengthening effect on the alloy, as a result, the strengthen of U-Mo-Ti-Al quaternary alloy is greatly improved while the plasticity almost decreases to zero.

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王震宏,張立同,陳冬,鄧鴻章. Ti/Al合金化對U-5.5Mo合金組織與力學性能的影響[J].稀有金屬材料與工程,2021,50(8):2807~2814.[Wang Zhenhong, Zhang Litong, Chen Dong, Deng Hongzhang. Effect of Ti / Al Alloying on Microstructure and Mechanical Properties of U-5.5Mo Alloy[J]. Rare Metal Materials and Engineering,2021,50(8):2807~2814.]
DOI：10.12442/j. issn.1002-185X.20200666

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歷史
  • 收稿日期:2020-09-03
  • 最后修改日期:2020-12-06
  • 錄用日期:2020-12-22
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31