The effect of post-weld heat treatment on the microstructure and notched tensile fracture of Ti–15V–3Cr–3Al–3Sn to Ti–6Al–4V dissimilar laser welds

Hsieh, Chia-Lung; Shiue, Ren-Kae; Tsay, L.W.

doi:10.1016/j.msea.2015.12.013

Cited by 24 publications

(15 citation statements)

References 36 publications

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“…Such an α + β interlayer morphology between the α-laths was not observed in the as-welded fusion zone of DTW of Ti-6-4/Ti-15-3 ( Fig. 8c) [41]. An increase in the PWHT temperature beyond 480 °C resulted in a reduction in the FZ hardness of Ti-6-4/Ti-15-3 [41], Ti-6-4/Ti-6-6-2 [39], Ti-6-4/SP700 [40] DTWs as shown in Fig.…”

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 85%

“…7 that in the DTW of Ti-6-4/Ti-15-3, PWHT up to 427 °C results in the highest increase in microhardness (from 289 HV at room Fig. 7 Influence of the PWHT temperatures on the microhardness of the FZ in different welds Ti-6-4/Ti-15-3 [41], Ti-6-4/Ti-6-6-2 [39], Ti-6-4/SP700 [40] temperature to nearly 483 HV at 427 °C) as compared to Ti-6-4/Ti-6-6-2 (from 380 HV at room temperature to around 412 HV at 483 °C) or Ti-6-4/SP700 (from 398 HV at room temperature to approximately 437 HV at 478 °C). This is because of the high Mo EQ of approximately 13.8 in the parent metal of Ti-15-3 as shown in Fig.…”

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 97%

“…For instance, in EBW of Ti-22Al-25Nb/TC11 joint, a lower microhardness of the HAZ and a reduction in impact toughness were observed due to the formation of soft B2 phase [47]. Similar behavior was observed in laser welding of Ti-22Al-25Nb/TA15 [32], TIG-laser hybrid welding of Ti-22Al-25Nb/TA15 [42], CO 2 laser welding of Ti-6Al-4V/Ti-4.5A1-3V-2Fe-2Mo, laser welding of BTi-6431S/TA15 [32], laser welding of Ti-6-4/beta-C [51], laser welding of Ti-15V-3Cr-3Al-3Sn/Ti-6Al-4V [41] and electron beam welding of Ti55/TA15.…”

Section: Issues In Dtaw and Approaches To Address Themmentioning

confidence: 99%

“…Another important aspect is the response of a dissimilar weld joints to age hardening which is also strong function of Mo EQ . Weld joints with a high Mo EQ have a high content of retained β and therefore experience relatively more hardening during PWHT [41]. On the other hand, an increase in the Al EQ and reduction in Mo EQ reduce the retained β, thus leading to the formation of coarser grains in the as-welded FZ of dissimilar titanium alloy joints, and the impact toughness [49] is expected to improve [53].…”

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 99%

“…7. This was because of the formation of platelet α and growth of the thick α-layer at the grain boundaries in the FZ of DTWs [39][40][41].…”

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 99%

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Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

Junaid

Cheema

2020

JMST Adv.

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The extensive use of titanium alloys in a variety of complex industrial applications may be attributed to their properties of high strength-to-weight ratio, corrosion resistance and high temperature strength. Recently, the use of dissimilar titanium alloys has become popular to achieve contrasting characteristics in a single unit. In the fabrication of the structures, joining methods such as welding hold the key in the attainment of the desired characteristics. The present study is aimed at reviewing various state-of-the-art processes used for welding of dissimilar titanium alloys. In particular, the influence of different welding methods such as gas tungsten arc welding (GTAW), laser and electron beam welding on the microstructure, mechanical properties and other characteristics of dissimilar weldments of α, α + β and β titanium alloys has been emphasized. The underlying phenomena that govern the effect of weld processing parameters on the mechanical strength, microstructure and weld joint quality of the alloys were exploited. Moreover, detailed investigations on the fusion zone porosities and evolution of intermetallic concept at the interfacial regions have been examined. Furthermore, different remedial approaches to enhance the joint quality such as beam offsetting, process hybridization, aging and post-weld heat treatments are investigated thoroughly. The latest trends in dissimilar welding of titanium alloys to upheave further research in this area have been reported in the context of their application in industrial applications.

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Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 85%

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 97%

Section: Issues In Dtaw and Approaches To Address Themmentioning

confidence: 99%

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 99%

“…7. This was because of the formation of platelet α and growth of the thick α-layer at the grain boundaries in the FZ of DTWs [39][40][41].…”

Section: Aging and Post-weld Heat Treatments (Pwht)mentioning

confidence: 99%

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Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

Junaid

Cheema

2020

JMST Adv.

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Effects of Solution Treatment on the Microstructure and Mechanical Properties of Ti–22Al–25Nb Alloys

Kou

Tang

et al. 2017

Adv Eng Mater

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The effects of solution treatment on the microstructure and mechanical properties of Ti-22Al-25Nb alloy are investigated. Numerous equiaxed a 2 particles distribute in a B2 matrix after solution treatment in the a 2 þ B2 region. The growth rate of the B2 grain increases with solution temperature and decreases with increasing holding time. When the solution temperature is lower than B2-transus, it is seen that both the strength and ductility decrease with increasing solution temperature and holding time. After being solution-treated at a super-transus temperature, the alloy with a fully B2 microstructure shows an ultralow elongation ($5%) and a typical brittle fracture characteristic.

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The Evolution of the Weld Metal Microstructures in Dissimilar Titanium Welds Based on Al and Mo Equivalents

Tsai

Hsieh

Shiue

et al. 2017

J. of Materi Eng and Perform

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The effect of post-weld heat treatment on the microstructure and notched tensile fracture of Ti–15V–3Cr–3Al–3Sn to Ti–6Al–4V dissimilar laser welds

Cited by 24 publications

References 36 publications

Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

Effects of Solution Treatment on the Microstructure and Mechanical Properties of Ti–22Al–25Nb Alloys

The Evolution of the Weld Metal Microstructures in Dissimilar Titanium Welds Based on Al and Mo Equivalents

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