Paper Title:
Notched Tensile Fracture of Ti-6Al-6V-2Sn Welds at Elevated Temperature
  Abstract

The notched tensile tests of Ti-6Al-6V-2Sn laser welds with distinct post-weld heat treatments (PWHTs) were carried out at 150, 300, and 450oC and the results were also compared with the mill-annealed base metal (BM). The BM specimen had the highest notched tensile strength (NTS) among the specimens being tested at room temperature but became the lowest at 450oC. At/above 150oC, all welds showed a decrease in NTS with increasing temperature. The cracks tended to grow along the α / β interface in the BM specimen. The formation of premature fine pores at the grain boundary in the weld with PWHT at 704oC accounted for the intergranular dimple fracture of the specimen. The fracture appearance of the as-welded (AW) and the 482oC-aged (W-482) welds comprised of mainly transgranular dimple and increased the extent of grain boundary shear at elevated temperature.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
1137-1140
DOI
10.4028/www.scientific.net/AMR.79-82.1137
Citation
L. W. Tsay, C.L. Hsu, "Notched Tensile Fracture of Ti-6Al-6V-2Sn Welds at Elevated Temperature", Advanced Materials Research, Vols. 79-82, pp. 1137-1140, 2009
Online since
August 2009
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Price
$32.00
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Authors: Salita Petchsang, Isaratat Phung-On, Hidenori Terasaki, Yu Ichi Komizo, Hajime Yamamoto
Chapter 5: Steels, Metals, Alloys and Intermetallic Compounds
Abstract:The aim of this investigation is to study the fracture location as well as mechanical properties of weldments from elevated temperature...
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