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高Nb-TiAl合金凝胶注模成形的制备研究林涛,刘小婷,邵慧萍,王志北京科技大学材料科学与工程学院摘 要:以球形的预合金粉末Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y和元素混合粉Ti+45%Al+10%Nb(%,原子分数)作为原料,研究了凝胶注模成形和氩气烧结制备高Nb-TiAl合金的工艺.研究...-TiAl,并含有少量的α和β相,其组织是近片层.高Nb-TiAl合金的预合金粉末经凝胶注模成形和烧结后,可获得组织均匀的高致密度合金,其抗压强度为1715MPa,相对压缩率为1.85%.关键词:高Nb-TiAl合金;凝胶注模成形;预合金粉;固含量;......
Cr和Mn元素掺杂对高Nb-TiAl合金组织转变及拉伸性能的影响杨亮1,辛景景1,张有为2,包春玲2,张来启1,林均品11. 北京科技大学新金属材料国家重点实验室2. 沈阳铸造研究所摘 要:研究了β稳定元素Cr和Mn的掺杂对高Nb-TiAl合金的组织,相组成,凝固路径及室温,高温拉伸性能的影响.结果表明,Ti-45Al-8Nb-0.4B(at%,下同)合金中分别加入2Cr,2Mn或1Cr1Mn后,铸态组织中B2相逐步增加,而α2相逐步减少.1Cr1Mn合金转变为由γ+B2两相组成的新型β-γ高Nb-TiAl合金.凝固路径由L→β→β+α→α+γ+β→α2+γ+B2转变为L→β→β+γ→B2+γ.Cr和Mn的同时添加具有更明显的β相稳定作用.室温拉伸结果表明,随着B2相含量的增加,合金的强度与延伸率均降......
-Nd alloy; heavy rare-earth; aging characteristics; high temperature tensile; microstructure 1 Introduction The industry, as well as the scientist, focused their attention on the development... and the aluminum alloy 332.0 in mechanical properties at room and high temperatures[2-8]. However, a large amount of heavy rare earth elements are added to magnesium, as a result, the alloy is more......
Trans. Nonferrous Met. Soc. China 22(2012) 1582-1587 High temperature oxidation behavior of directionally solidified NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho eutectic alloy WANG Zhen-sheng1,2, XIE Yi2,3, GUO... film ruptured. Trace rare earth element Ho distributed uniformly in the alloy and relatively high level of Al in Cr(Mo) phase are beneficial to the formation of continuous and compact Al2O3 scale......
Effect of high density electropulsing treatment on formability of TC4 titanium alloy sheet SONG Hui(宋 辉), WANG Zhong-jin(王忠金), GAO Tie-jun(高铁军) School of Materials Science and Engineering...; Abstract: An annealed TC4 titanium alloy sheet was treated by high density electropulsing (Jmax=(5.09-5.26)×103A/mm2, tp=110......
and Technology, Guilin 541004, China)Abstract:The influence of exfoliation corrosion on the tensile properties of a high strength Al-Zn-Mg-Cu alloy was investigated by ambient temperature tensile testing...Influence of exfoliation corrosion on tensile properties of a high strength Al-Zn-Mg-Cu alloyLIU Sheng-dan(刘胜胆)1, LIAO Wen-bo(廖文博)1,2, TANG Jian-guo(唐建国)1, ZHANG Xin-ming(张新明)1, LIU Xin-yu(刘心宇)1,2......
Interfacial Behavior of Sulfur and Yttrium in Yttrium Modified Ni3Al-Based Alloy IC6 during High Temperature Oxidation Process XIAO Cheng-bo1,HAN Ya-fang1 (1.Beijing Institute of Aeronautical... between oxide scale and substrate. Another reason of increasing the high temperature oxidation resistance of alloy IC6 by the addition of yttrium is that yttrium migrates to the grain boundaries of oxides......
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