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材料工程  2015, Vol. 43 Issue (12): 75-80    DOI: 10.11868/j.issn.1001-4381.2015.12.013
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
Al-Ti-C和Al-Ti-B对7050铝合金微观组织与力学性能的影响
黄元春1,2, 杜志勇1,2, 肖政兵1,2, 颜徐宇1,2
1. 中南大学 有色金属先进结构材料与制造协同创新中心, 长沙 410012;
2. 中南大学 高性能复杂制造国家重点实验室, 长沙 410012
Effect of Al-Ti-C and Al-Ti-B on Microstructure and Mechanical Performance of 7050 Aluminum Alloy
HUANG Yuan-chun1,2, DU Zhi-yong1,2, XIAO Zheng-bing1,2, YAN Xu-yu1,2
1. Collaborative Innovation Center of Advanced Nonferrous Structural Materials and Manufacturing, Central South University, Changsha 410012, China;
2. The State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410012, China
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摘要 采用金相显微镜(OM)、扫描电镜(SEM)及能谱仪(EDS),结合拉伸力学性能与维氏硬度测试,研究了Al-5Ti-1B和Al-5Ti-0.2C晶粒细化剂对含Zr的7050铝合金铸态、均匀化态以及时效变形态的微观组织演变规律、第二相析出行为及力学性能的影响。结果表明:在7050合金中,Zr元素会使Al-5Ti-1B和Al-5Ti-0.2C均发生细化"中毒现象",降低晶粒细化剂的细晶效果;与Al-Ti-1B相比,增大Al-Ti-0.2C晶粒细化剂的添加量对于缓解"Zr中毒"现象,细化晶粒更有效,且能够提高合金强度与硬度,并使合金保持较好伸长率;同时,使用Al-5Ti-0.2C晶粒细化剂的7050合金,其第二相的分布较使用Al-5Ti-1B晶粒细化剂更加弥散、均匀。
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黄元春
杜志勇
肖政兵
颜徐宇
关键词 Al-5Ti-0.2CAl-5Ti-1B7050铝合金晶粒细化Zr中毒    
Abstract:The effect of Al-5Ti-1B and Al-5Ti-0.2C grain refiners on the microstructure evolution rule of 7050 aluminum alloy with Zr at as-cast, as-homogenization and as-ageing states, precipitation behaviour of the second phases and mechanical properties was studied by optical microscope (OM),scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), combined with mechanical tensile properties and Vickers hardness test. The results show that the existence of Zr element in 7050 aluminum alloy causes Al-5Ti-1B and Al-5Ti-0.2C refining occurring the phenomenon "poisoning",which reduces the refining effect of grain refiner; comparing with Al-5Ti-1B, increasing the amount of Al-5Ti-0.2C grain refiner is more effective to ease the "Zr poisoning" phenomenon, to refine grains, and can improve the strength and hardness, while keeping good elongation rate; Meanwhile, comparing with the 7050 alloy using the Al-5Ti-1B grain refiner, the distribution of the second phases present in 7050 aluminum alloy is more dispersed and uniform than the alloy using Al-5Ti-0.2C refiner.
Key wordsAl-5Ti-0.2C    Al-5Ti-1B    7050 aluminum alloy    grain refinement    Zr poisoning
收稿日期: 2014-05-31      出版日期: 2015-12-23
中图分类号:  TG146.2+1  
通讯作者: 黄元春(1966-),男,教授,博士,从事专业:铝及铝合金加工及基础研究,联系地址:湖南省长沙市中南大学轻合金研究院217办公室(410012)     E-mail: dzhiyong123@hotmail.com
引用本文:   
黄元春, 杜志勇, 肖政兵, 颜徐宇. Al-Ti-C和Al-Ti-B对7050铝合金微观组织与力学性能的影响[J]. 材料工程, 2015, 43(12): 75-80.
HUANG Yuan-chun, DU Zhi-yong, XIAO Zheng-bing, YAN Xu-yu. Effect of Al-Ti-C and Al-Ti-B on Microstructure and Mechanical Performance of 7050 Aluminum Alloy. Journal of Materials Engineering, 2015, 43(12): 75-80.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.12.013      或      http://jme.biam.ac.cn/CN/Y2015/V43/I12/75
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