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| 颗粒激发形核在热挤压Al6061/SiCp复合材料再结晶过程中的作用 | |
| 引用本文： | C.S.RAMESH,R.KESHAVAMURTHY,K.T.KASHYAP. 颗粒激发形核在热挤压Al6061/SiCp复合材料再结晶过程中的作用[J]. 中国有色金属学会会刊, 2013, 23(1): 53-58. DOI: 10.1016/S1003-6326(13)62428-0 |
| 作者姓名： | C.S.RAMESH R.KESHAVAMURTHY K.T.KASHYAP |
| 作者单位： | Department of Mechanical Engineering,PES Institute of Technology,Bangalore 560085,India;Visiting Professor,School of Design,Engineering and Computing,Bournemouth University,United Kingdom;Central Manufacturing Technology Institute,Tumkur Road,Bangalore 560022,India |
| 基金项目： | granting financial assistance to carry out this work which is a part of research project No.SR/S3/ME/019/2004-SERC |
| 摘 要： | 采用电子背散射衍射技术,研究SiCp增强热挤压A16061铝合金复合材料的织构和微观组织演变.A16061铝合金及其Ni包覆SiCp增强的复合材料织构中都存在强的β纤维,其轴平行于挤压方向.在未用SiCp增强的热挤压A16061铝合金中,除了主要的立方织构001)<100>,在完全再结晶晶粒中也存在部分等轴结构.这种再结晶织构的出现归因于粒径小于5μm的SiCp粒子的形成而产生的粒子激发形核.在这些条件下,低Z(～1012 S-1)值证实了粒子激发形核是再结晶的主导机制之一,且受变形区的形成而非储能的控制. |
| 关 键 词： | 金属基复合材料 6061/SiCp复合材料 挤压 粒子激发形核 再结晶 储能 |
| 收稿时间： | 2012-03-12 |
Role of particle stimulated nucleation in recrystallization of hot extruded Al 6061/SiC_p composites |
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| C.S.RAMESH , R.KESHAVAMURTHY , Praveennath G.KOPPAD , K.T.KASHYAP. Role of particle stimulated nucleation in recrystallization of hot extruded Al 6061/SiC_p composites[J]. Transactions of Nonferrous Metals Society of China, 2013, 23(1): 53-58. DOI: 10.1016/S1003-6326(13)62428-0 | |
| Authors: | C.S.RAMESH R.KESHAVAMURTHY Praveennath G.KOPPAD K.T.KASHYAP |
| Affiliation: | 1. Department of Mechanical Engineering, PES Institute of Technology, Bangalore 560085, India; Visiting Professor, School of Design, Engineering and Computing, Bournemouth University, United Kingdom 2. Central Manufacturing Technology Institute, Tumkur Road, Bangalore 560022, India 3. Department of Mechanical Engineering, PES Institute of Technology, Bangalore 560085, India |
| Abstract: | Studies on texture and microstructure evolution in hot extruded Al 6061 aluminium alloy reinforced with uncoated and nickel coated SiCp were carried out by electron backscattered diffraction technique. Textures of both the alloy and its composite with nickel coated SiCp do exhibit strong β fiber with its axis parallel to the direction of extrusion. In addition to the dominant cube texture (001)〈100〉, fully recrystallized grains with partially equiaxed structure have been observed in the alloy reinforced with uncoated SiCp. The recrystallization texture of this composite can be attributed to the particle stimulated nucleation (PSN) due to the presence of SiCp with size less than 5 µm. Under these conditions, the low value of Zener–Hollomon, Z (～ 1012 s?1) confirms that PSN is one of the dominant mechanisms for recrystallization and is governed by formation of deformation zone rather than stored energy. |
| Keywords: | metal matrix composites 6061/SiCp composite extrusion particle stimulated nucleation recrystallization stored energy |
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