Comparison of TIG welded and friction stir welded Al–4.5Mg–0.26Sc alloy

Muñóz, A.; Rückert, Guillaume; Huneau, Bertrand; Sauvage, Xavier; Marya, Surendar

doi:10.1016/j.jmatprotec.2007.06.035

Cited by 99 publications

(62 citation statements)

References 11 publications

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“…In general, the microstructure appeared to be completely recrystallized for all of the cases studied. This observation was in agreement with previous studies of friction-stirred AlMg-Sc alloys [11,12,23,31,35].…”

Section: Friction-stir Weldssupporting

confidence: 94%

“…There were no evident volumetric defects in the welds. This result confirms the feasibility of FSW for producing sound joints in Al-Mg-Sc alloys, as reported in earlier works [9,11,22,23]. A distinct stir zone was evident in each weld.…”

Section: Base Materialssupporting

confidence: 91%

“…A similar morphology of the stir zone that evolved during FSW of an Al-Mg-Sc alloy was recently reported in Refs. [11,35].…”

Section: Base Materialsmentioning

confidence: 99%

“…In the hardened state, the weld strength is also relatively low [9,10]. In non-heat-treatable alloys, this effect is mainly related to recrystallization occurring during FSW [3,8,[11][12]. In the heat treatable alloys this it is conventionally attributed to the dissolution or coarsening of reinforcement precipitates, e.g., [13].…”

Section: Introductionmentioning

confidence: 99%

“…Dispersoids generally increase the YS and the ultimate tensile strength (UTS) by more than 50% [14,[17][18][19][20][21]. However, conventional fusion welding of Al-Mg-Sc-Zr alloys leads to the dissolution of these unique precipitates and a corresponding degradation in the material strength [11,22,23]. Consequently, arc welding cannot increase the joint efficiency beyond 85% in the annealed condition.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Friction-stir welding of an Al–Mg–Sc–Zr alloy in as-fabricated and work-hardened conditions

Malopheyev

Kulitskiy

Mironov

et al. 2014

Materials Science and Engineering: A

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tThe effect of prior work hardening on the microstructure and mechanical properties of a friction-stir welded (FSWed) Al-5.4Mg-0.2Sc-0.1Zr alloy was investigated. The microstructure of the final stir zone was shown to be weakly dependent on the initial condition of the base material; FSW led to the formation of fully recrystallized microstructures with average grain sizes ranging from 1.2 to 1.5 μm and a moderate dislocation density of $ 3.57 1.5 Â 10 13 m À 2 in the stir zone. The nano-scale Al 3 (Sc,Zr) dispersoids coarsened from 9 to $ 15 nm but retained a coherent relationship with the matrix. In contrast, the joint efficiency of the obtained welds was very sensitive to the initial material condition. Nearly full strength joints were obtained in both annealed (O) and partially hardened and stabilized (H323) conditions. However, the joint efficiency was only 65% in the fully hardened condition (H18). The relatively low weld strength for the alloy in the H18 condition was attributed to the elimination of dislocation and substructure strengthening during FSW.

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