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《Chinese Journal of Materials Research》 2016-01
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Mechanical Property of Powder Compact and Forming of Large Thin-Wall Cylindrical Structure of Ti55 Alloys

XU Lei;GUO Ruipeng;CHEN Zhiyong;JIA Qing;WANG Qingjiang;Institute of Metal Research, Chinese Academy of Sciences;School of Materials and Metallurgy, Northeastern University;  
Pre-alloyed powders of T55 have been hot-isostatic-pressed(HIPed) at different HIPing temperatures, and the powder compacts were solution- and aging- treated. Thereafter the powder compacts were carefully examined to establish the relationship between their microstructure and mechanical property. Powder compacts HIPed at 940℃ and 970℃ showed no significant difference on the microstructure and tensile properties. Due to the densification wave effect caused by a non-uniformity of temperature/pressure field during HIPing, the recommended HIPing temperature is 940℃ in this work. The tensile property of powder compact at 600℃ was improved obviously after solution- and aging- treatment. The tensile property of the heat- treated powder compact is close to that of the wrought alloy but better than those of the cast ones. Finite element analysis was used to predict the final dimensions of the small casing component after HIPing, which is well consonant with the experimental data, thus, the FEM analysis is an efficient method for the design and manufacture of powder components. Based on the optimal container design and FEM analysis, a large thin-wall cylindrical structure of Ti55 alloys was manufactured successfully.
【CateGory Index】: TF123.23
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1 Xue Pengju;Wei Qingsong;Wu Yan;Shi Yusheng;State Key Laboratory of Material Processing and Die and Mould Technology,Huazhong University of Science and Technology;;Study on surface morphology of TC4 alloy powder produced by hot isostatic pressing[J];Journal of Huazhong University of Science and Technology(Natural Science Edition);2014-01
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