Transactions of Materials and Heat Treatment

Title：Microstructure and conductance of 2A50 aluminium alloy after equal channel angular pressing

Authors： LUAN Zhao-ju LI Jian-ping LI Chao (Material school Nanchang Aviation University Nanchang 330034 China)

Unit：

KeyWords： equal channel angular pressing 2A50 aluminium alloy conductance

ClassificationCode：TG379

year,vol(issue):pagenumber：2008,33(3):82-84

Abstract：

2A50 aluminium alloy was applied to equal channel angular pressing.The die of 120° intersectant angle was designed.The specimen was rotated 90°clockwise between each pressing.The microstructure and physical character of 2A50 aluminium alloy were investigated after ECAP.The result shows that 2A50 aluminium alloy can be pressed many times under the room temperature successfully.The dimension of the grains drops to 164 nm and reaches the range of submicrocrystal level,meanwhile Vickers microhardness and the mechanical property rise greatly,but conductance declines markedly from 18784.63 S/M to 3553.27 S/M after 3 passes of ECAP.

Funds：

江西省自然科学基金资助项目(0550091)

Reference：

[1]农登,黄少军,李林,等.等径角挤压法工艺路线影响材料显微组织演化的研究概况[J].广东有色金属学报,2006,16(3):202-205.
[2]张郑,王经涛,赵西成.7475铝合金ECAP的晶粒细化极限[J].中国有色金属学报,2004,14(5):741-745.
[3]郑立静,陈昌麒,周铁涛,等.ECAP细晶机制及对纯铝显微组织和力学性能的影响[J].稀有金属材料与工程,2004,33(12):1325-1328.
[4]毕见强,孙康宁,范润华,等.2A12铝块体超细晶材料的ECAP制备[J].人工晶体学报,2006,35(4):221-223.
[5]张郑,席明哲,王经涛.7475铝合金的ECAP组织细化研究[J].轻合金加工技术,2000,28(10):37-40.
[6]郑立静,张炎,曾梅光,等.ECAP制备的亚微7050铝合金的力学性能和微观结构[J].中国有色金属学报,2002,33(12):1012-1015.
[7]郑立静,邓江宁,张焱,等.采用ECAP制备亚微晶铝合金及其力学性能[J].东北大学学报,2002,23(7):694-696.
[8]刘先兰,张文玉.模具结构对等径角挤压材料显微组织的影响[J].锻压技术,2006,31(4):41-46.
[9]张郑,杜忠泽.7475铝合金ECAP变形及组织热稳定性[J].有色金属,2004,56(5):31-35.
[10]Takeshi Fujita,Zenji Horita.Characteristics of diffusion inAl±Mg alloys with ultrafine grain sizes[J].Phil-osophicalMagazine,2002,82(11):2249-2262.
[11]Zhang Z G,Watanabe Y,Kim I.Effect of texture evolutionon tensile properties of Al-Ni eutectic alloy fabricated by equalchannel angular pressing[J].Materials Science and Tech-nology,2005,2(6):708-714.

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