泡沫Al-0.38Sc合金的力学性能和耐腐蚀性能

展旭和; 黄粒; 杜旭初; 丁小明; 赵明花; 陈军洲

doi:10.15980/j.tzzz.2019.11.002

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泡沫Al-0.38Sc合金的力学性能和耐腐蚀性能
Compressive Strength and Corrosion Resistance Properties of Cellular Al-0.38Sc Foams
2019年39卷第11期页码：1164-1168
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.11.002

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[1]展旭和,黄粒,杜旭初,丁小明,赵明花,陈军洲.泡沫Al-0.38Sc合金的力学性能和耐腐蚀性能[J].特种铸造及有色合金,2019,39(11):1164-1168.

Zhan Xuhe, Huang Li, Du Xuchu, et al. Compressive Strength and Corrosion Resistance Properties of Cellular Al-0.38Sc Foams[J]. Special Casting & Nonferrous Alloys, 2019,39(11):1164-1168.
[1]展旭和,黄粒,杜旭初,丁小明,赵明花,陈军洲.泡沫Al-0.38Sc合金的力学性能和耐腐蚀性能[J].特种铸造及有色合金,2019,39(11):1164-1168. DOI： 10.15980/j.tzzz.2019.11.002.

Zhan Xuhe, Huang Li, Du Xuchu, et al. Compressive Strength and Corrosion Resistance Properties of Cellular Al-0.38Sc Foams[J]. Special Casting & Nonferrous Alloys, 2019,39(11):1164-1168. DOI： 10.15980/j.tzzz.2019.11.002.

摘要

采用熔体发泡法制备孔隙率为48%～86%的闭孔泡沫Al-0.38Sc合金

研究Sc对闭孔泡沫铝力学性能、压缩形为和耐腐蚀性能的影响。结果表明

经适当热处理后

泡沫Al-0.38Sc合金基体中均匀析出大量纳米级Al

Sc粒子

这些粒子可有效钉扎晶界和位错

改善闭孔泡沫铝的压缩力学性能。热处理还可有效改善泡沫Al-0.38Sc合金的耐腐蚀性能

经热处理后的泡沫Al-0.38Sc试样自腐蚀电流与Nyqusit曲线半径与泡沫铝基本相当

这表明加入适量的Sc并配合适当热处理

可有效提高泡沫Al-0.38Sc合金的力学性能和耐腐蚀性能。

Abstract

The cellular Al-0.38Sc foams with a porosity ranging from 48% to 86% were fabricated successfully via the melt-foaming method.The compressive behaviors

corrosion resistance and effects of minor Sc additions on the strengthening mechanism of the cellular Al-Sc alloy foams were investigated.The results reveal that minor Sc additions can improve dramatically the compressive strength of the cellular Al foams due to formation of the Al

Sc precipitates uniformly distributed in the matrix after heat treatment

to pin the grain boundary/dislocations.Moreover

the self-etch current and radius of the Nyqusit curve radius of the cellular Al-0.38Sc foams are close to cellular Al foam

showing that the Sc addition combined with proper heat treatment is an effective way to improve the mechanical performance of Al-based alloy foams with desirable corrosion resistance.