Microstructure and fatigue performance of single and multiple linear fiber laser welded DP980 dual-phase steel

Xu, Wangqiong; Westerbaan, D.; Nayak, S.S.; Chen, D.L.; Goodwin, Frank; Biro, E.; Zhou, Y.

doi:10.1016/j.msea.2012.05.091

Cited by 89 publications

(47 citation statements)

References 39 publications

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“…4(d). Similar results were reported on both titanium alloys [25,31] and steels where the steel FZ also transformed into martensite [32][33][34][35][36]. In addition, it is also observed that the hardness value (Fig.…”

supporting

confidence: 86%

Tensile and fatigue behavior of electron beam welded dissimilar joints of Ti–6Al–4V and IMI834 titanium alloys

Wang

Zhou

et al. 2016

Materials Science and Engineering: A

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supporting

confidence: 86%

Tensile and fatigue behavior of electron beam welded dissimilar joints of Ti–6Al–4V and IMI834 titanium alloys

Wang

Zhou

et al. 2016

Materials Science and Engineering: A

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“…The formation of soft region on the HAZ can be attributed to decarburization which leads to carbon denude zone in which thermal conductivity is relatively low. Moreover, the soft zone observed on the HAZ can also be ascribed to carbon depletion whereas enrichment in the weld zone results leads to formation of hard and brittle carbide phases [7]. However, the results indicated that the presence of narrow soft zone greatly reduced when compared to other welding techniques.…”

Section: Macro and Microstructural Characterizationmentioning

confidence: 91%

“…With smaller heat input and higher cooling rate, the laser welding has more advantages compared to the submerged arc welding and the multi-pass gas metal arc welding. Similarly, compared to the friction stir welding and the resistance spot welding, the laser welding becomes more productive because of its automation and flexibility [7].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical and mechanical properties of laser welded high strength low alloy steel

Oyyaravelu

Kuppan

Natarajan

2016

Journal of Advanced Research

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The study aimed at investigating the microstructure and mechanical properties of Neodymium-Doped Yttrium Aluminum Garnet (Nd:YAG) laser welded high strength low alloy (HSLA) SA516 grade 70 boiler steel. The weld joint for a 4 mm thick plate was successfully produced using minimum laser power of 2 kW by employing a single pass without any weld preheat treatment. The micrographs revealed the presence of martensite phase in the weld fusion zone which could be due to faster cooling rate of the laser weldment. A good correlation was found between the microstructural features of the weld joints and their mechanical properties. The highest hardness was found to be in the fusion zone of cap region due to formation of martensite and also enrichment of carbon. The hardness results also showed a narrow soft zone at the heat affected zone (HAZ) adjacent to the weld interface, which has no effect on the weld tensile strength. The yield strength and ultimate tensile strength of the welded joints were 338 MPa and 549 MPa, respectively, which were higher than the candidate metal. These tensile results suggested that the laser welding process had improved the weld strength even without any weld preheat treatment and also the fractography of the tensile fractured samples showed the ductile mode of failure.

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“…It is noted that Farabi et al [29] and Xu et al [30,31] reported a softer zone in the HAZ when compared with the BM of the laser welded dual-phase steel joints. In their work, tempered martensites were observed in the softer zone while the BM was fully martensites.…”

Section: Micro-hardness Distributionmentioning

confidence: 94%

Effect of microstructure on strain hardening and strength distributions along a Cr–Ni–Mo–V steel welded joint

Zhu

Xuan

2015

Materials & Design (1980-2015)

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Microstructure and fatigue performance of single and multiple linear fiber laser welded DP980 dual-phase steel

Cited by 89 publications

References 39 publications

Tensile and fatigue behavior of electron beam welded dissimilar joints of Ti–6Al–4V and IMI834 titanium alloys

Tensile and fatigue behavior of electron beam welded dissimilar joints of Ti–6Al–4V and IMI834 titanium alloys

Metallurgical and mechanical properties of laser welded high strength low alloy steel

Effect of microstructure on strain hardening and strength distributions along a Cr–Ni–Mo–V steel welded joint

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