Effect of microstructure on small fatigue crack initiation and early propagation behavior in Mg-10Gd-3Y-0.3Zr alloy

Chao He, Yujuan Wu, Liming Peng, Ning Su, Qiang Chen, Shucheng Yuan, Yongjie Liu, Qingyuan Wang

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Microstructural cyclic deformation mechanisms and their relation to small fatigue crack initiation and early propagation behavior were experimentally investigated in a rare earth-containing magnesium alloy (Mg-Gd-Y-Zr). The results indicate that basal slip is the dominant deformation mechanism, especially in coarse grains, and eventually leads to fatigue crack initiation. Early crack propagation behavior was strongly influenced by local microstructural heterogeneities in grain size and orientation. Three kinds of microstructures—favorably-oriented coarse grains, fine grain clusters and unfavorably-oriented coarse grains—are discussed in terms of their deformation mechanisms and resistance to crack propagation. These microstructural effects caused highly variable crack propagation rates within the first ∼200 μm of cracks.

元の言語英語
ページ(範囲)311-319
ページ数9
ジャーナルInternational Journal of Fatigue
119
DOI
出版物ステータス出版済み - 2 1 2019

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Fatigue Crack
Crack Initiation
Crack Propagation
Crack initiation
Microstructure
Crack propagation
Propagation
Magnesium Alloy
Rare Earths
Grain Size
Magnesium alloys
Slip
Rare earths
Crack
Cracks
Fatigue cracks

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

これを引用

Effect of microstructure on small fatigue crack initiation and early propagation behavior in Mg-10Gd-3Y-0.3Zr alloy. / He, Chao; Wu, Yujuan; Peng, Liming; Su, Ning; Chen, Qiang; Yuan, Shucheng; Liu, Yongjie; Wang, Qingyuan.

:: International Journal of Fatigue, 巻 119, 01.02.2019, p. 311-319.

研究成果: ジャーナルへの寄稿記事

He, Chao ; Wu, Yujuan ; Peng, Liming ; Su, Ning ; Chen, Qiang ; Yuan, Shucheng ; Liu, Yongjie ; Wang, Qingyuan. / Effect of microstructure on small fatigue crack initiation and early propagation behavior in Mg-10Gd-3Y-0.3Zr alloy. :: International Journal of Fatigue. 2019 ; 巻 119. pp. 311-319.
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abstract = "Microstructural cyclic deformation mechanisms and their relation to small fatigue crack initiation and early propagation behavior were experimentally investigated in a rare earth-containing magnesium alloy (Mg-Gd-Y-Zr). The results indicate that basal slip is the dominant deformation mechanism, especially in coarse grains, and eventually leads to fatigue crack initiation. Early crack propagation behavior was strongly influenced by local microstructural heterogeneities in grain size and orientation. Three kinds of microstructures—favorably-oriented coarse grains, fine grain clusters and unfavorably-oriented coarse grains—are discussed in terms of their deformation mechanisms and resistance to crack propagation. These microstructural effects caused highly variable crack propagation rates within the first ∼200 μm of cracks.",
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AU - Peng, Liming

AU - Su, Ning

AU - Chen, Qiang

AU - Yuan, Shucheng

AU - Liu, Yongjie

AU - Wang, Qingyuan

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AB - Microstructural cyclic deformation mechanisms and their relation to small fatigue crack initiation and early propagation behavior were experimentally investigated in a rare earth-containing magnesium alloy (Mg-Gd-Y-Zr). The results indicate that basal slip is the dominant deformation mechanism, especially in coarse grains, and eventually leads to fatigue crack initiation. Early crack propagation behavior was strongly influenced by local microstructural heterogeneities in grain size and orientation. Three kinds of microstructures—favorably-oriented coarse grains, fine grain clusters and unfavorably-oriented coarse grains—are discussed in terms of their deformation mechanisms and resistance to crack propagation. These microstructural effects caused highly variable crack propagation rates within the first ∼200 μm of cracks.

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