Enhanced mechanical properties of ARB-processed aluminum alloy 6061 sheets by subsequent asymmetric cryorolling and ageing
Enhanced mechanical properties of ARB-processed aluminum alloy 6061 sheets by subsequent asymmetric cryorolling and ageing
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DOI：
10.1016/j.msea.2016.08.003
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发表时间：
2016-09-30
期刊：
影响因子：
6.4
通讯作者：
Kong, Charlie
中科院分区：
文献类型：
--
作者：
Yu, Hailiang;Su, Lihong;Kong, Charlie
晶粒度和析出物影响超细晶材料的强度和塑性。本研究采用累积滚压技术(ARB)制备了6061铝合金板材。ARB处理后的板材随后进行冷轧和不对称冷轧。将板材在100℃下进一步时效48h。力学测试表明，非对称深冷和时效相结合，显著提高了ARB处理板材的延性和强度。利用光学显微镜、扫描电子显微镜、透射电子显微镜和X射线衍射仪对板材不同工艺阶段的显微组织进行了分析，以确定板材的力学性能与组织之间的关系。(C)2016爱思唯尔B.V.保留所有权利。
Grain size and precipitations affect the strength and ductility of ultrafine-grained materials. In this study, aluminum alloy 6061 sheets were fabricated using the accumulative roll bonding (ARB) technique. The ARB-processed sheets were subsequently subjected to cryorolling and asymmetric cryorolling. The sheets were further aged at 100 degrees C for 48 h. Mechanical tests show that a combination of asymmetric cryorolling and ageing results in significant improvement in both the ductility and the strength of the ARB-processed sheets. The microstructures of the sheets at different stages of the process were also analyzed using optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffraction in order to correlate the mechanical properties with the microstructure. (C) 2016 Elsevier B.V. All rights reserved.