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The effect of annealing on microstructure and tensile properties of Ti-22Al-25Nb electron beam weld joint
Chen, W; Chen, ZY; Wu, CC; Li, JW; Tang, ZY; Wang, QJ; Chen, W (reprint author), Beijing Aeronaut Mfg Technol Res Inst, Power Beam Proc Lab, Beijing 100024, Peoples R China.
2016-08-01
发表期刊INTERMETALLICS
ISSN0966-9795
卷号75页码:8-14
摘要This study investigated the microstructure evolution and tensile properties of Ti-22Al-25Nb EBW joints. The fusion zone of the as-welded joint exhibited a fully B2 microstructure. Widmanstatten O particles precipitated out of B2 matrix after annealing and their size increased within a temperature range from 750 degrees C to 900 degrees C. In the heat affected zone, there was a transition of microstructure moving away from the fusion zone towards the base material. Strength and elongation of the as-welded sample were significantly improved after annealing, which was attributed to the strengthening effect of O precipitates and the slip transmission between O and B2 phases. Samples tensile tested at 650 degrees C all failed within the fusion zone and exhibited intergranular failure instead of transgranular failure at room temperature. The room temperature strength and hardness of the joints decreased with annealing temperature due to the coarsening of O precipitates. At 650 degrees C, failure occurred by intergranular fracture in the fusion zone and the joint strength of all annealed samples was similar due to similar B2 grain boundary strength. (C) 2016 Elsevier Ltd. All rights reserved.
部门归属[chen, w. ; li, j. w. ; tang, z. y.] beijing aeronaut mfg technol res inst, power beam proc lab, beijing 100024, peoples r china ; [chen, z. y. ; wu, c. c. ; wang, q. j.] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词Intermetallics Ti2alnb Electron Beam Welding Microstructure Tensile Properties
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者Power Beam Processing Laboratory Research Fund
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76316
专题中国科学院金属研究所
通讯作者Chen, W (reprint author), Beijing Aeronaut Mfg Technol Res Inst, Power Beam Proc Lab, Beijing 100024, Peoples R China.
推荐引用方式
GB/T 7714
Chen, W,Chen, ZY,Wu, CC,et al. The effect of annealing on microstructure and tensile properties of Ti-22Al-25Nb electron beam weld joint[J]. INTERMETALLICS,2016,75:8-14.
APA Chen, W.,Chen, ZY.,Wu, CC.,Li, JW.,Tang, ZY.,...&Chen, W .(2016).The effect of annealing on microstructure and tensile properties of Ti-22Al-25Nb electron beam weld joint.INTERMETALLICS,75,8-14.
MLA Chen, W,et al."The effect of annealing on microstructure and tensile properties of Ti-22Al-25Nb electron beam weld joint".INTERMETALLICS 75(2016):8-14.
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