Grain refinement and high performance of titanium alloy joint using arc-ultrasonic gas tungsten arc welding
Authors:
- L.-B. HeLHL.-B. He
- L.-M. LiLLL.-M. Li
- H.-W. HaoHHH.-W. Hao
- M.-S. WuMWM.-S. Wu
- R.-L. ZhouRZR.-L. Zhou
- 1 February 2006
- journal article
- Published by SAGE Publications in Science and Technology of Welding and Joining
- Vol. 11 (1) , 72-74
Abstract
Arc-ultrasonic welding technology is one approach for refining the grain structure in titanium alloy welds. This paper reports work in which welds were produced in an α-β titanium alloy under a variety of conditions, including conventional gas tungsten arc welding (GTAW) and arc-ultrasonic GTAW. The results show that arc-ultrasonic energy refined β grain structure in the weld metal, and improved the fatigue life of weld joints. Ultrasonic energy enhances fluid flow, reduces temperature gradients, and causes a continual high frequency oscillation in the welding pool. These effects are believed to be responsible for refining the solidification structure and improving the performance of titanium weld joints.Keywords
This publication has 2 references indexed in Scilit:
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- Microstructural refinement of weld fusion zones in α–β titanium alloys using pulsed current weldingMaterials Science and Engineering: A, 1999