Four-Dimensional Annihilation Behaviors of Micro Pores during Surface Cold Working
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- Toda Hiroyuki
- Department of Mechanical Engineering, Toyohashi University of Technology
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- Yamaguchi Tomoyasu
- Process Tech Team, Research and Development Center, ASAHI TEC Corporation
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- Nakazawa Mitsuru
- Department of Electronics & Electrical Engineering, Keio University
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- Aoki Yoshimitsu
- Department of Electronics & Electrical Engineering, Keio University
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- Uesugi Kentaro
- Japan Synchrotron Radiation Research Institute
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- Suzuki Yoshio
- Japan Synchrotron Radiation Research Institute
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- Kobayashi Masakazu
- Department of Mechanical Engineering, Toyohashi University of Technology
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The annihilation behavior of micro pores in an aluminum alloy casting during surface cold working was continuously observed using the synchrotron radiation microtomography. To analyze micro pore annihilation behavior, the displacement of artificially dispersed particles was measured and thereby local strain distributions were mapped in high-density. A peening treatment annihilated most of the micro pores with a diameter of over 10 μm in the upper part of the specimen that could initiate fatigue cracks. The annihilation behavior of the micro pores could be understood as a function of effective strain locally accumulated around them, and not as a function of local hydrostatic strain. The effective strain varied significantly, with some large pores remaining where local effective plastic strain was relatively low. The complete annihilation of large pores in the surface layer suggests that the application of sufficiently long surface cold working is effective in improving the high-cycle fatigue properties.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 51 (7), 1288-1295, 2010
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
- 1390282679226971648
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- NII論文ID
- 10027018848
- 130004454514
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 10735932
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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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- 使用不可