Precipitation Behavior and Properties of Cu-Ti Alloys with Added Nitrogen
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- Ikeda Jun
- Department of Materials Science, Osaka Prefecture University
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- Semboshi Satoshi
- Department of Materials Science, Osaka Prefecture University Kansai Center, Institute for Materials Research, Tohoku University
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- Iwase Akihiro
- Department of Materials Science, Osaka Prefecture University
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- Gao Weilin
- Technology Center, Dowa Metaltech Co. Ltd.
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- Sugawara Akira
- Technology Center, Dowa Metaltech Co. Ltd.
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The effects of adding nitrogen (N) to age-hardenable Cu-Ti alloys on their microstructure, hardness, and conductivity have been investigated. It was found that the aging of Cu-Ti-(0.06–0.6) mol% N alloys resulted in the continuous formation of finely precipitated needle-shaped α-Cu4Ti grains and the discontinuous formation of coarse cellular components composed of a stable β-Cu4Ti and Cu solid solution at the grain boundaries, in a manner similar to that in the case of conventional Cu-Ti alloys without any N. Furthermore, a small amount of granular TiN particles was also formed in Cu-Ti-N alloys. The hardening behavior of Cu-Ti-N alloys was similar to that of Cu-Ti alloys without N. This similarity was attributed to the finely dispersed precipitation of α-Cu4Ti that was similar between Cu-Ti alloys with and without N. The electrical conductivity of Cu-Ti-N alloys increased more steeply than that of Cu-Ti alloys without N. This is because in the case of Cu-Ti-N alloys, the co-precipitation of α-Cu4Ti, β-Cu4Ti, and TiN efficiently reduced the Ti concentration in the matrix. Thus, the conductivity of peak-hardened Cu-Ti-N alloys can be improved by optimizing the N concentration and aging temperature.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 56 (3), 297-302, 2015
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
- 1390001204253289600
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- NII論文ID
- 130004825264
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 026220302
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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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