Effects of Stress-Relief Annealing on the Residual Stress and the Microstructure of TA15 Welded Joint

Teng Ma; Xiao Yun Song; Wen Jun Ye; Song Xiao Hui; Rui Liu

doi:10.4028/www.scientific.net/MSF.849.281

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HomeMaterials Science ForumMaterials Science Forum Vol. 849Effects of Stress-Relief Annealing on the Residual...

Effects of Stress-Relief Annealing on the Residual Stress and the Microstructure of TA15 Welded Joint

Abstract:

The effects of stress-relief annealing on the distribution of residual stress and on the microstructure of TA15 (Ti-6.5Al-2Zr-1Mo-1V) alloy joints by electron beam welding (EBW) were investigated. The results indicated that the microstructure of welded joint presented a transitional change, i.e. basket-weave structure appeared in the fusion zone while equiaxed α structure in base metal. No significant change occurred in microstructure after annealing at 650°C for 2 h. The residual stress in fusion zone was mainly tensile stress and the maximum longitudinal stress value was 473MPa. After annealing, the residual stress near the welded joint exhibited a uniform distribution and the maximum stress droped to 150 MPa. The yield stress and tensile stress of the TA15 welding zone were 1016 MPa and 1100 MPa respectively.

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Periodical:

Materials Science Forum (Volume 849)

Pages:

281-286

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.849.281

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Online since:

March 2016

Authors:

Teng Ma, Xiao Yun Song, Wen Jun Ye, Song Xiao Hui, Rui Liu

Keywords:

Microstructure, Residual Stress, Stress-Relief Annealing, TA15 Titanium Alloy

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