Impact of homogenization heat treatment on the high temperature deformation behavior of cast AZ31B magnesium alloy

Wong, Tsz Wun; Hadadzadeh, Amir; Benoit, Michael J.; Wells, Mary A.

doi:10.1016/j.jmatprotec.2017.11.039

Cited by 19 publications

(8 citation statements)

References 18 publications

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“…Spectrum 3 in Figure 7 indicates that α-aluminum alloy grains consist of Al and Mg, 95 at.% and 5 at.%, respectively. Figure 5 also shows the possible presence of (MnFe)Al 6 , Al 2 Mg 2 Zn 3 (Т-phase) [62,63], AlNi 3 [64], Al 2 Cu (θ phase) [65], and Al 2 CuMg (S-phase) [65] phases.…”

Section: Resultsmentioning

confidence: 99%

Effect of Microstructure on the Corrosion Resistance of TIG Welded 1579 Alloy

et al. 2019

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The paper studies microstructure, chemical composition and corrosion activity of the tungsten inert gas welded joint of the Al-Mg-Sc alloy. An intensive corrosion attack of the heat affected zone (HAZ) was found due to precipitation of secondary phases at recrystallized grain boundaries. The ccorrosion process initiated along the boundary of α-Al grains, where a high concentration of anodic (Mg2Si and Mg2Al3) and cathodic phases ((MnFe)Al6) was observed. Increased temperatures during welding led to coalescence of the anodic phases in HAZ. Additionally, HAZ was found to be enriched with hard intermetallic compounds (Mg2Si and (MnFe)Al6). This area had a higher microhardness (930 MPa) compared to base metal (BM, 895 MPa) and fusion zone (FZ, 810 MPa). The volume fraction of secondary phases was 26% in BM, 28% in FZ and 38% in HAZ. The average grain size increased in the following order: (9 ± 3) µm (BM) < (16 ± 3) µm (HAZ) < (21 ± 5) µm (FZ). A plasma electrolytic oxidation (PEO) coating of aluminum-based material was applied to protect the weld from oxidation. The PEO-coating provided a high corrosion protection in the aggressive Cl−-containing environment.

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Section: Resultsmentioning

confidence: 99%

Effect of Microstructure on the Corrosion Resistance of TIG Welded 1579 Alloy

et al. 2019

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“…In other metal alloys, the microhardness differences between phases or regions also have significant influence on the hot ductility. Wong et al [13] proposed that large deformed grains were deformed less readily than the soft dynamic recrystallization regions. According to Wong et al [13], internal cracks can form in the AZ31 alloy between deformed and recrystallized grains.…”

Section: Discussionmentioning

confidence: 99%

“…Wong et al [13] proposed that large deformed grains were deformed less readily than the soft dynamic recrystallization regions. According to Wong et al [13], internal cracks can form in the AZ31 alloy between deformed and recrystallized grains. is is similar to the case observed by Wang et al [11], where crack nucleation sites are mainly between "hard" parent grains and "soft" necklace dynamic recrystallization grains.…”

Section: Discussionmentioning

confidence: 99%

Effect of Strain Rate on Hot Ductility of a Duplex Stainless Steel

Wang

2019

Advances in Materials Science and Engineering

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Duplex stainless steels (DSSs) often have bad hot workability. In this study, specimens of 2205 DSS were hot tensioned over a strain rate range from 0.005 s -1 to 50 s -1 to examine the hot ductility. e crack morphology was observed, and the dependence of hot ductility on the strain rate was analyzed. From 0.005 s -1 to 0.5 s -1 , both the total elongation and the reduction in area increased with the strain rate. e reduction in area exhibited a small decrease when the strain rate was greater than 0.5 s -1 . More than 85% of cracks formed between the ferrite and austenite, and no less than 70% of crack tips propagated between the ferrite and austenite. When the strain rate was increased from 0.005 s -1 to 0.5 s -1 , dynamic recrystallization was promoted in the austenite, and the number fraction of low-angle grain boundaries in the ferrite was improved. e higher strain rate reduced the difference between ferrite and austenite in hardness, which improved the hot ductility. For 2205 DDS, the suggested strain rate is 0.5 s -1 and above to avoid surface and edge cracking during hot forging or hot rolling. e findings will be of value for the understanding of hot ductility of DSSs and other dual-phase alloys.

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“…Magnesium (Mg) alloys, being the lightest commercially available alloys, are found to be proper candidate for this purpose due to their low density, high specific strength, and excellent machinability 1 . Although cast Mg alloys can be used to produce lightweight components, the traditional casting process are prone to detrimental defects that significantly reduces mechanical properties such as ductility and fatigue resistance 2,3 . As such, wrought processes, like forging and extrusion, have been employed to overcome process defects and significantly improve Mg properties 4 .…”

Section: Introductionmentioning

confidence: 99%

“…1 Although cast Mg alloys can be used to produce lightweight components, the traditional casting process are prone to detrimental defects that significantly reduces mechanical properties such as ductility and fatigue resistance. 2,3 As such, wrought processes, like forging and extrusion, have been employed to overcome process defects and significantly improve Mg properties. 4 However, magnesium applications have been limited and need to be broadened into load-bearing parts in massproduced vehicles.…”

Section: Introductionmentioning

confidence: 99%

Multiaxial fatigue behavior of low‐temperature closed‐die forged ZK60 extrusion under proportional and non‐proportional loading

Karparvarfard

Roostaei

Behravesh

et al. 2022

Fatigue Fract Eng Mat Struct

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Uniaxial and multiaxial fatigue characteristics of as-extruded and extrudedthen-forged ZK60 magnesium alloys were examined to understand the influence of low-temperature forging on its deformation mechanics. Upon forging, basal texture weakening and grain refinement occurred in ZK60 extrusion. Based on uniaxial results, forging process led to improvements in quasi-static tensile strength and axial cyclic response in high-cycle fatigue regime, whereas shear responses remained unaffected. Biaxial non-proportional tests demonstrated that changing phase angle shift between axial and torsional waveforms had no effect on cyclic axial response, contrary to the shear response. Lastly, critical-plane and energy-based life prediction models were assessed.

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Impact of homogenization heat treatment on the high temperature deformation behavior of cast AZ31B magnesium alloy

Cited by 19 publications

References 18 publications

Effect of Microstructure on the Corrosion Resistance of TIG Welded 1579 Alloy

Effect of Microstructure on the Corrosion Resistance of TIG Welded 1579 Alloy

Effect of Strain Rate on Hot Ductility of a Duplex Stainless Steel

Multiaxial fatigue behavior of low‐temperature closed‐die forged ZK60 extrusion under proportional and non‐proportional loading

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