热等静压对铍铝合金组织及性能的影响
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摘要
采用精密铸造技术制备铍铝合金,研究了Ag、Co、Ge等添加元素在铍铝合金中的分布特点和作用,分析了热等静压对合金微观组织、力学性能和断口形貌的影响。结果表明,Ag、Ge分布于铝相中强化铝相,Co元素存在于铍相和铝相中,主要强化铍相。通过热等静压处理可以改善合金力学性能,提高延伸率,增加相界面厚度,但对合金的微观组织和断裂模式不产生影响。
Be-Al alloy was prepared by precision casting,distribution characteristics and function of added elements of Ag,Co and Ge in the alloy were studied,and the effect of hot isostatic pressing(HIP)on microstructure,mechanical properties and fracture morphology was analyzed.The results show that Ag and Ge are distributed in aluminum phase to strengthen aluminum phase,and Co exists in beryllium phase and aluminum phase mainly to strengthen beryllium phase.HIP can improve the mechanical properties,the elongation and the phase interface thickness of the alloy,but cannot influence alloy microstructure and fracture mode.
Be-Al alloy was prepared by precision casting,distribution characteristics and function of added elements of Ag,Co and Ge in the alloy were studied,and the effect of hot isostatic pressing(HIP)on microstructure,mechanical properties and fracture morphology was analyzed.The results show that Ag and Ge are distributed in aluminum phase to strengthen aluminum phase,and Co exists in beryllium phase and aluminum phase mainly to strengthen beryllium phase.HIP can improve the mechanical properties,the elongation and the phase interface thickness of the alloy,but cannot influence alloy microstructure and fracture mode.
引文
[1]钟景明.中国铍业[M].北京:冶金工业出版社,2015:62-71.
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[5]李军义,王东新,刘兆刚,等.铍铝合金制备工艺与应用进展[J].稀有金属,2017,41(2):208-210.
[6]焦旗,马玲,冯婷,等.银、钴、锗对铍铝合金组织及性能的影响[J].特种铸造及有色合金,2010,30(10):973-976.
[7]王战宏,王莉,赵双群,等.Ni对Be-Al合金组织和性能的影响[J].特种铸造及有色合金,2006,26(8):526-528.
[8]马玲,赵双群,王战宏,等.热等静压温度对铍铝合金显微组织及力学性能的影响[J].飞航导弹,2006(8):57-59.
[9]丘志聪,肖大武,陈向林,等.温度对铍力学性能的影响[J].稀有金属,2015,39(1):16-22.
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[2]SPEER William,ES-SAID Omar S.Application of aluminum-beryllium composite for structural aerospace component[J].Engineering Failure Analysis,2004,11(6):895-902.
[3]Roskill Information Services.The economics of beryllium[M].6th ed.London:Roskill Information Services,2001:52.
[4]NACHTRAB W T,LEVOY N.Beryllium-aluminum alloy development for investment casting[J].Advanced Materials and Processes,1997,151(5):23-25.
[5]李军义,王东新,刘兆刚,等.铍铝合金制备工艺与应用进展[J].稀有金属,2017,41(2):208-210.
[6]焦旗,马玲,冯婷,等.银、钴、锗对铍铝合金组织及性能的影响[J].特种铸造及有色合金,2010,30(10):973-976.
[7]王战宏,王莉,赵双群,等.Ni对Be-Al合金组织和性能的影响[J].特种铸造及有色合金,2006,26(8):526-528.
[8]马玲,赵双群,王战宏,等.热等静压温度对铍铝合金显微组织及力学性能的影响[J].飞航导弹,2006(8):57-59.
[9]丘志聪,肖大武,陈向林,等.温度对铍力学性能的影响[J].稀有金属,2015,39(1):16-22.
[10]WILLIAM T N,LEVOY Nancy F,RAFTERY Kevin R.Light weight,high strength,beryllium aluminum alloy:US5603780[P].1997-02-18.
[11]许德美,李峰,王战宏,等.粉末热等静压和铸造BeAl合金的室温拉伸断裂机理[J].中国有色金属学报,2009,19(12):2 128-2 135.