書誌事項
- タイトル別名
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- Influence of Cold-Working on Damping Characteristics of Al-Zn Alloys
- Al Zn ゴウキン ノ ゲンスイノウ ニ オヨボス レイカン カコウ ノ エ
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Effect of cold-working on the damping of furnace-cooled or water-quenched Al-Zn alloys with 0-100%Zn was studied by varying the reduction in area. Measurements of the logarithmic decrement δ and the regidity modulus G were carried out by the inverted pendulum method at a frequency of 1 Hz. The hardness Hv was measured using a micro-Vickers hardness tester, and the specific weight S by the Archimedean method.<BR>Except for the water-quenched alloys with 70-90%Zn, the heat-treated alloys have generally a low δ. The order of magnitude of δ in the alloys subjected to heat-treatments depends on the viscous flow at the grain boundary between α and β phases. Upon cold-working, the δ becomes considerably larger with increasing reduction in area. The increase in δ is due to the increasing boundary effect resulting from the refinement of grains and to the increasing viscous and hysteretic motions of dislocations.<BR>Hv values of the alloys with 10-70%Zn water-quenched from 673 K are considerably higher than those for furnace-cooling. On the other hand, the alloys with 80-90%Zn furnace-cooled show Hv values higher than those water-quenched. The nearer the eutectoid composition, the lower becomes the Hv value after cold-working. G values of the alloys water-quenched from 573 K or furnace-cooled from 573 and 673 K increase with increasing Zn content, while those after water-quenching from 673 K show a minimum value at 50%Zn. The G upon cold-working is nearly constant up to 40%Zn and increases rapidly with Zn content in excess of 40%, regardless of the prior heat-treatment. The S increases with Zn content, but the value is generally as small as 4.8 Mg/m3 even for the Al-70%Zn alloy.
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 46 (9), 929-934, 1982
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
- 1390001206484511616
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- NII論文ID
- 130007337365
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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
- 2463665
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- データソース種別
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- JaLC
- NDL
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