Effects of weld cross-section profiles and microstructure on properties of pulsed Nd YAG laser welding of Ti6Al4V sheet
Release Time:2025-04-30
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- Date:
- 2025-04-30
- Title of Paper:
- Effects of weld cross-section profiles and microstructure on properties of pulsed Nd YAG laser welding of Ti6Al4V sheet
- Journal:
- Int J Adv Manuf Technol
- Summary:
- In this study, the influence of weld cross-sectional profiles and microstructure, under different welding conditions, was investigated on the mechanical properties of pulsed Nd:YAG laser-welded joint of Ti6A14V alloy. The V- and H-shaped weld cross-section profiles were obtained under low and high heat input, respectively. The microstructure in the fusion zone (FZ) of V- and H-shaped welded joint consisted of a fine acicular martensitic α′ solidification structure within the prior-β grains, responsible for the maximum hardness in the FZ. Tensile tests revealed that the V-shaped welded joint fractured at the near heat-affected zone (HAZ)/base metal (BM) interface, but the H-shaped welded joint fractured in the BM. Furthermore, the tensile strength of the V-shaped welded joint was lower than that of the H-shaped welded joint. This was attributed to the fact that the heterogeneity of strain distribution at the interface of HAZ and BM of the V-shaped welded joint was greater than that of the H-shaped welded joint during tensile process.
- Co-author:
- XL Gao, LJ Zhang*, J Liu, JX Zhang
- Volume:
- 72(5-8)
- Page Number:
- 895-903
- Translation or Not:
- No
- Date of Publication:
- 2014-05-01