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  • 《Scripta Materialia》
    年:2017   卷:130   期数:   ISSN:1359-6462   点击量:525
    Title:    New approach to achieve high strength powder metallurgy Ti-6Al-4V alloy through accelerated sintering at β-transus temperature and hydrogenation-dehydrogenation treatment
    文章编号:    20170001
    作者:     
                
    Author(s):     Fei Cao, K.S.Ravi Chandran, Pankaj Kumar
                
    关键词:    
    Keywords:    Titanium; Powder metallurgy; Tensile strength; Ductility; Grain size
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    摘要:     
    Abstract:     It is demonstrated that high density powder metallurgy (PM) Ti-6Al-4V alloy, with a finer prior-β grain size, can be achieved by vacuum sintering of TiH2 compacts at the β-transus (1010 ℃) temperature, taking advantage of the accelerated self-diffusion. The subsequent refinement of the coarse lamellar microstructure by hydrogenation-dehydrogenation treatment produces a high tensile strength (~1130 MPa) and ductile (~10%) alloy. The superior tensile strength and ductility result from the nanoscale Widmanstatten structure and the finer prior-β grain size, respectively, created by the two treatments. The results show a promising pathway to make high strength and ductile PM titanium alloys.
    页码:     22-26
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    通过在β相变温度加速烧结和氢化脱氢处理制备高强粉末冶金Ti-6Al-4V合金
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