Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Processed by High-Pressure Torsion
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- Watanabe Chihiro
- Kanazawa University
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- Hibino Masakazu
- Kanazawa University
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- Monzen Ryoichi
- Kanazawa University
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- Ii Seiichiro
- National Institute for Materials Science
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- Tsuchiya Koichi
- National Institute for Materials Science
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Abstract
<p>The microstructural change and aging behavior of Cu-1.8mass%Be-0.2mass%Co and Cu-3mass%Ti alloys severely deformed by high-pressure torsion (HPT) at room temperature were investigated on two-step aging condition; natural aging and subsequent artificial aging. Application of HPT processing under an applied pressure of 5 GPa for 10 revolutions at 1 rpm to the alloys produced ultra-fine grained structures. The hardnesses of the Cu-Be-Co and Cu-Ti alloys increased with equivalent strain up to 7, and then saturated to constant values of 400 and 330 Hv, respectively. Aging the HPT-processed alloys at 293 K gradually decreased the resistivities of the alloys; however, even after the longest natural aging period of 2.59 Ms (1 month), the hardnesses of the alloys remained essentially unchanged. The attained peak hardness of the Cu-Be-Co alloy on subsequent artificial aging at 593 K decreased with increasing natural aging time, while the age-hardening behavior of the Cu-Ti alloy during aging at 623 K was practically unaffected by natural aging at 293 K up to 2.59 Ms.</p>
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 57 (9), 1471-1475, 2016
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282679231500672
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- NII Article ID
- 130005289935
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 027571124
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed