Effects of Overload on Fatigue Crack Growth in Mg Alloys
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- ZHANG Xuechao
- Graduate School of Science and Engineering, University of the Ryukyus
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- MORI Keisuke
- Douwa-forging Co.
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- MAKABE Chobin
- Faculty of Engineering, University of the Ryukyus
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- INOUE Shin-ichi
- Magnesium Research Center, Kumamoto University
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- ANDO Shinji
- Magnesium Research Center, Kumamoto University
Bibliographic Information
- Other Title
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- Mg合金の疲労き裂進展に及ぼす過大荷重の影響
- Mg ゴウキン ノ ヒロウ キレツ シンテン ニ オヨボス カダイ カジュウ ノ エイキョウ
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Abstract
<p>Push-pull fatigue tests of rolled magnesium alloys AZ31 and AZX912 were performed with a side-notch plate specimen to examine the effect of a single overload on the crack growth behavior under a stress ratio of -1. The behavior in retardation of crack growth was unclear in the case of AZ31 because the crack growth rate was relatively higher at the overload point. However, this was observed clearly, when the branching of the crack tip happened in the case of AZX912. The geometry of the fracture surface and the changes in crack growth path were related to the crack growth behavior. The crack opening level became higher when the crack growth rate was lower. Therefore, the crack closure is related to the retardation of the crack growth rate. When the branching of a crack tip occurred, not only the residual compression stress at crack front but also the variation of local crack growth direction after overload affected the fatigue crack growth behavior. </p>
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 70 (6), 473-478, 2021-06-15
The Society of Materials Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390288448339535104
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- NII Article ID
- 130008054276
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 031578999
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed