|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.
|Abstract||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.|
; 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
Electron Beam Welding
|Subject Area||Chemistry, Physical
; Materials Science, Multidisciplinary
; Metallurgy & Metallurgical Engineering
|Funding Organization||Power Beam Processing Laboratory Research Fund
|Corresponding Author||Chen, W (reprint author), Beijing Aeronaut Mfg Technol Res Inst, Power Beam Proc Lab, Beijing 100024, Peoples R China.|
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.
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.
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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