書誌事項
- タイトル別名
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- An Abnormal Hardening Phenomenon in Kovar Caused by the Transformation during Cold-Working
- カコウ チュウ ノ ヘンタイ ニ ヨル Kovar ノ イジョウ コウカ ゲンショウ
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Kovar alloy now being used for glass sealing consists of a single γ phase at room temperature. But according to the phase diagram, two phases of α and γ may exist in the equiliburium state. Therefore when its Ms point is not so low under room temperature, the transformation from γ to α phase may take place during cold-working and may cause a decrease of workability by abnormal hardening. In this experiment the characteristics of work-hardening in unstable Kovar were examined by measuring the change of hardness with rolling and the stress-strain curve in tensile tests. An abnormal hardening was observed after about 40∼50% reduction in specimens with low nickel content. The hardening degree of such specimens was about 100%, while it was about a half in specimens with high nickel content, after about 80% reduction. The former specimens also showed about 40% increase of hardness by a low temperature annealing and a slight softening by a cold treatment. A nickel content over 29∼29.5% was necessary to prevent Kovar from hardening by transformation during cold-working.
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 24 (12), 790-794, 1960
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
- 1390001206481582720
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- NII論文ID
- 40018257615
- 130007333109
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 9153055
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- データソース種別
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- JaLC
- NDL
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