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Title: Notched tensile fracture of Ti–4.5Al–3V–2Fe–2Mo welds at elevated temperatures
Authors: L.W.Tsay;C. L. Hsu;C. Chen
Contributors: NTOU:Institute of Materials Engineering
Keywords: Ti–4.5Al–3V–2Fe–2Mo;Notched tensile strength;Post-weld heat treatment;Microstructure;Fracture
Date: 2010-04-15
Issue Date: 2011-10-20T08:07:30Z
Publisher: Materials Chemistry and Physics
Abstract: Abstract:Notched tensile tests of Ti–4.5Al–3V–2Fe–2Mo welds with distinct post-weld heat treatments (PWHTs) were carried out at 150, 300, and 450 °C. The results were also compared with those of mill-annealed base metal (the MB specimen) tested at the same conditions. The as-welded (AW) specimen exhibited notch brittleness even when tested at 450 °C, partly due to a fast age-hardening response at the test temperature. In contrast, the weld with PWHT at 482 °C exhibited severe notch brittleness at room temperature but showed an increase in strength and ductility as the temperature increased. In general, the weld with PWHT at 704 °C (the W-704 specimen), AW and MB specimens displayed reduced notched tensile strength (NTS) with increasing temperature. At elevated temperatures, the W-704 specimen with coarse α + β structures in a basket-weave form also demonstrated superior NTS to the MB specimen with banded α + β structures.
Relation: 120(2-3), pp.715-721
URI: http://ntour.ntou.edu.tw/handle/987654321/23721
Appears in Collections:[材料工程研究所] 期刊論文

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