The cyclic softening and evolution of microstructures for Mg–10Gd–2.0Y–0.46Zr alloy under low cycle fatigue at 573K

Wu, Lijun; Yang, Zhong; Xia, Weijun; Chen, Zhenhua; Yang, Lei

doi:10.1016/j.matdes.2011.10.056

Cited by 36 publications

(13 citation statements)

References 20 publications

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“…The SEM images taken at a higher magnification in the crack propagation area ( Fig.15(a) and (b)) showed that at both strain amplitudes, the fatigue crack propagation region encompassed some striation-like features which were basically the distinct line markings appearing on the fractured surface. Similar characteristics were presented in [19][20][21][22]61,69] as well. These striation-like markings were noted to be perpendicular to the crack propagation direction.…”

Section: Fractographysupporting

confidence: 76%

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Strain-controlled low cycle fatigue properties of a rare-earth containing ZEK100 magnesium alloy

Mokdad

Chen

2015

Materials & Design

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Section: Fractographysupporting

confidence: 76%

“…Similarly,Wu et al [61]. The results shown in Figs 9 and 10 helped emphasize the conclusions drawn earlier when interpreting the hysteresis loops(Fig.8), where ZEK100 Mg alloy exhibited, once again, a behavior lying in-between both comparison alloys (e.g., AM30 and GW103K).…”

supporting

confidence: 77%

Strain-controlled low cycle fatigue properties of a rare-earth containing ZEK100 magnesium alloy

Mokdad

Chen

2015

Materials & Design

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“…Other studies includes the LCF behaviour of extruded Mg‐12Gd‐3Y‐0.5Zr by Yin and Li, extruded Mg‐10Gd‐2Y‐0.5Zr by Zhu et al ., extruded Mg‐10Gd‐3Y‐0.5Zr (GW103K) in Refs. and as‐cast Mg‐10Gd‐2.0Y‐0.46Zr alloy by Wu et al . In addition, Fu et al .…”

Section: Fatigue Of Re–mg Alloysmentioning

confidence: 99%

“…LCF occurs at the high stress level and low numbers of cycles, and the relevant strain–life data are required in the design of structural components especially in the automotive industry. While there are many reports on the fully reversed ( R ε = −1) strain‐controlled fatigue behaviour of RE‐free Mg alloys, for example, AZ31, ZK60, AM60B and AZ91, a number of studies on the strain‐controlled LCF behaviour of RE‐Mg alloys have recently been performed . Most of the studies involved the strain‐controlled LCF behaviour of Mg–Gd–Y system/alloys.…”

Section: Fatigue Of Re–mg Alloysmentioning

confidence: 99%

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Fatigue of rare‐earth containing magnesium alloys: a review

Mirza

Chen

2014

Fatigue Fract Eng Mat Struct

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A B S T R A C T Lightweighting in ground vehicles is today considered as one of the most effective strategies to improve fuel economy and reduce anthropogenic environment-damaging and climate-changing emissions. Magnesium (Mg) alloy, as a strategic ultra-lightweight metallic material, has recently drawn a considerable interest in the transportation industry to reduce the weight of vehicles due to their high strength-to-weight ratio, dimensional stability, good machinability and recyclability. However, the hexagonal close-packed crystal structure of Mg alloys gives only limited slip systems and develops sharp deformation textures associated with strong mechanical anisotropy and tension-compression yield asymmetry. For the vehicle components subjected to dynamic loading, such asymmetry could exert an unfavourable influence on the material performance. This problem could be conquered through weakening the texture via addition of rare-earth (RE) elements. Thus, a number of RE-containing Mg alloys have recently been developed. To guarantee the structural integrity, durability and safety of highly loaded structural components, understanding the characteristics and mechanisms of cyclic deformation and fatigue fracture of such RE-Mg alloys is of vital importance. In this review, the available fatigue properties including stress-controlled fatigue strength, strain-controlled cyclic deformation characteristics and fatigue crack propagation behaviour are summarized, along with the microstructural change and crystallographic texture weakening in the RE-containing Mg alloys in different forms (cast, extruded and heat-treated states), in comparison with those of RE-free Mg alloys.Keywords fatigue; magnesium alloy; rare-earth element; texture; tension-compression yield asymmetry. N O M E N C L A T U R Eb = fatigue strength exponent (-) c = fatigue ductility exponent (-) E = Young's modulus (GPa) HCF = high cycle fatigue (-) K′ = cyclic strength coefficient (MPa) LCF = low cycle fatigue (-) n′ = cyclic strain hardening exponent (-) N f = number of cycles to failure (-) R ε = strain ratio (-) S = stress (MPa) α, β = phase designations (-) Δε e /2 = elastic strain amplitude (%) Δε p /2 = plastic strain amplitude (%) Δε t /2 = total strain amplitude (%) Δσ/2 = stress amplitude (MPa) ε′ f = fatigue ductility coefficient (-) σ′ f = fatigue strength coefficient (MPa) σ′ y = cyclic yield strength (MPa)

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Hot compressive deformation behavior and electron backscattering diffraction analysis of Mg95.50Zn3.71Y0.79 fine-grained alloy solidified under high pressure

et al. 2017

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The cyclic softening and evolution of microstructures for Mg–10Gd–2.0Y–0.46Zr alloy under low cycle fatigue at 573K

Cited by 36 publications

References 20 publications

Strain-controlled low cycle fatigue properties of a rare-earth containing ZEK100 magnesium alloy

Strain-controlled low cycle fatigue properties of a rare-earth containing ZEK100 magnesium alloy

Fatigue of rare‐earth containing magnesium alloys: a review

Hot compressive deformation behavior and electron backscattering diffraction analysis of Mg95.50Zn3.71Y0.79 fine-grained alloy solidified under high pressure

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