A new magnesium sheet alloy and its multi-stage homogenization for simultaneously improved ductility and strength at room temperature

Shi, Renhai; Miao, Jr‐Ming; Luo, Alan A.

doi:10.1016/j.scriptamat.2019.06.027

Cited by 50 publications

(19 citation statements)

References 31 publications

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“…Magnesium sheet alloy preparation method was reported in a previous publication 18 . Mg-1Zn-1Al-0.5Ca-0.4Mn-0.2Ce (ZAXME11100) alloy was prepared in a steel crucible under a protective gas mixture of CO 2 and SF 6 , then cast at 750 °C into a steel mold pre-heated to 400 °C to produce 110 × 114 × 18 mm plates.…”

Section: Methodsmentioning

confidence: 99%

“…The improvement could be attributed to decreasing the intrinsic stacking fault energy (I 1 SFE) 15 to generate <c + a> dislocations, decreasing critical resolved shear stress (CRSS) of pyramidal <c + a > slip 16 , or providing the randomized texture 17 . Thus, the Mg-Zn-Al-Ca-Mn-Ce system is studied with a trace addition of Ce in this work, based on our earlier work 18 .…”

mentioning

confidence: 99%

“…Extensive research has been reported on discovering mechanical behaviors and improving alloy performance via optimizing alloy composition and thermomechanical processing (TMP) [18][19][20][21][22][23] . CALPHAD (CALculation www.nature.com/scientificreports www.nature.com/scientificreports/ of Phase Diagrams) modeling [24][25][26][27] , as a part of Integrated Computational Materials Engineering (ICME) 28 framework, has been successfully applied to study the alloying-processing-structure-property relationships in multicomponent alloy systems.…”

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confidence: 99%

“…In this paper, CALPHAD simulation is used to design a new homogenization process (with multiple isothermal stages including final stages at temperatures higher than the alloy solidus 18 ) for the new alloy, achieving maximum dissolution of alloying elements without incipient melting. The combination of the new alloy design and the multi-stage TMP process leads to the optimum combination of strength, ductility and formability of the new alloy.…”

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confidence: 99%

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A new magnesium sheet alloy with high tensile properties and room-temperature formability

Shi

Miao

Avey

et al. 2020

Sci Rep

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Lightweight sheet alloys with superior mechanical performance such as high strength, ductility and formability at room temperature (Rt) are desirable for high volume automotive applications. However, ductility or formability of metallic alloys at Rt are generally inversely related to strength, thereby making it difficult to optimize all three simultaneously. Here we design a new magnesium sheet alloy-ZAXME11100 (Mg-1.0Zn-1.0Al-0.5Ca-0.4Mn-0.2Ce, wt. pct.) via CALPHAD (CALculation of PHAse Diagram) modeling and experimental validation. This new sheet alloy offers an excellent RT formability with a high Index Erichsen (I.E.) value of 7.8 mm in a solution-treated condition (T4), due to its weak and split basal texture and fine grain structure. The new ZAXME 11100 alloy also shows a rapid agehardening response during post-forming artificial aging treatment at 210 °C for 1 hour (T6), resulting in a significant increase of yield strength from 159 MPa (T4) to 270 MPa (T6). The excellent combination of T4 ductility (31%), T4 formability (7.8 mm) and T6 yield strength (270 MPa) in this new magnesium alloy is comparable to that of common 6xxx series aluminum sheet alloys. Thus, this new magnesium sheet alloy is highly attractive for sheet applications in automotive and other industries.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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A new magnesium sheet alloy with high tensile properties and room-temperature formability

Shi

Miao

Avey

et al. 2020

Sci Rep

Self Cite

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“…Currently, magnesium alloys are being applied as the structural materials in many important fields such as automotive, aeronautical, and space due to high specific strength and other outstanding properties [1][2][3][4][5][6][7]. However, to further widen the application of wrought magnesium alloy products, one of the key challenges to be solved is yield asymmetry between tension and compression after thermo-mechanical processing [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Reducing Yield Asymmetry between Tension and Compression by Fabricating ZK60/WE43 Bimetal Composites

Zhao

Song

et al. 2020

Materials

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In this study ZK60/WE43 bimetal composite rods were manufactured by a special method of hot diffusion and co-extrusion. Interface microstructure, deformation mechanism, and yield asymmetry between tension and compression for the composite rods were systematically investigated. It was observed that the salient deformation mechanism of the ZK60 constituent was {10-12}<−1011> extension twinning in compression and prismatic slip in tension, and different deformation modes resulted in yield asymmetry between tension and compression. In contrast, the WE43 constituent tends to be more isotropic due to grain refinement, texture weakening, solid-solution and precipitation strengthening, which were deformed via basal slip, prismatic slip, and {10-12}<−1011> extension twinning in both tension and compression. Surprisingly, it was found that yield asymmetry between tension and compression for the ZK60/WE43 composite rods along the extrusion direction was effectively reduced with a compression-to-tension ratio of ~0.9. The strongly bonded interface acting as a stress transfer medium for the ZK60 sleeve and WE43 core exhibited the coordinated deformation behavior. This finding provides an effective method to decrease the yield asymmetry between tension and compression in the extruded magnesium alloys.

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Relating Texture and Thermomechanical Processing Variables in Mg–Zn–Ca Alloys

Berman

Allison

2020

The Minerals, Metals &Amp; Materials Series

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A new magnesium sheet alloy and its multi-stage homogenization for simultaneously improved ductility and strength at room temperature

Cited by 50 publications

References 31 publications

A new magnesium sheet alloy with high tensile properties and room-temperature formability

A new magnesium sheet alloy with high tensile properties and room-temperature formability

Reducing Yield Asymmetry between Tension and Compression by Fabricating ZK60/WE43 Bimetal Composites

Relating Texture and Thermomechanical Processing Variables in Mg–Zn–Ca Alloys

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