Effect of Microstructural Factors on Tensile Properties of an ECAE-Processed AZ31 Magnesium Alloy
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- Yoshida Yu
- Department of Mechanical Engineering, Nagaoka University of Technology
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- Cisar Lawrence
- Department of Mechanical Engineering, Nagaoka University of Technology
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- Kamado Shigeharu
- Department of Mechanical Engineering, Nagaoka University of Technology
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- Kojima Yo
- Department of Mechanical Engineering, Nagaoka University of Technology
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Mg–3%Al–1%Zn (AZ31) alloy was subjected to ECAE (Equal Channel Angular Extrusion) processing under various processing conditions. Then tensile tests were carried out at room temperature to investigate the relationship between tensile properties and microstructural parameters that include grain size and the texture generated by ECAE processing. In 4-pass ECAE specimens processed at 523 K, tensile ductility is improved as a result of easy basal slip during tensile test along the extrusion direction, because such specimens have textures in which the basal plane is inclined at 45° to the extrusion direction. On the other hand, in the specimens processed at 573 K, 0.2% proof stress is higher than those of specimens processed at lower temperatures, but elongation is smaller. This is because of difficult basal slip caused by the textures in which the basal plane is oriented parallel to the extrusion direction. However, 8-pass specimens processed at 473 K and subsequently annealed, which have similar textures but different grain sizes (d), exhibit clear grain size dependencies of 0.2% proof stress (σ0.2) according to Hall-Petch relationship; σ0.2=30+0.17d−1⁄2. Therefore, crystallographic orientation has a profound effect on the tensile properties of AZ31 alloy, and grain size has a little effect.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 44 (4), 468-475, 2003
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679226471680
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- NII論文ID
- 130004452095
- 10011910417
- 30018850923
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD3sXkslClsro%3D
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- ISSN
- 13475320
- 13459678
- http://id.crossref.org/issn/09161821
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- NDL書誌ID
- 6513444
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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