7050铝合金铸锭中Al3Zr的析出情况对锻板性能的影响

材料导报

2020, Vol. 34

Issue (Z1): 334-337

金属与金属基复合材料

7050铝合金铸锭中Al₃Zr的析出情况对锻板性能的影响

宋韦韦^1,2, 罗顺成¹, 韩兆玉¹, 晁代义^1,2, 方清万¹, 吕正风^1,2, 程仁策^1,2

1 山东南山铝业股份有限公司,龙口 265713;
2 国家铝合金压力加工工程技术研究中心,龙口 265700

Effects of Al₃Zr Dispersoids on Mechanical Properties of 7050Forging Plates

SONG Weiwei^1,2, LUO Shuncheng¹, HAN Zhaoyu¹, CHAO Daiyi^1,2, FANG Qingwan¹, LYU Zhengfeng^1,2, CHENG Rence^1,2

1 Shandong Nanshan Aluminium Co., Ltd., Longkou 265713, China;
2 National Engineering Research Center for Plastic Working of Aluminum Alloys, Longkou 265700, China

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摘要本工作采用不同均匀化工艺和控制Zr的添加量等手段获得了不同Al₃Zr析出情况的7050铝合金铸锭,系统研究了Al₃Zr的分布情况对相同厚度的7050-T74锻板的拉伸性能以及断裂韧性的影响规律。结果表明,Al₃Zr弥散相分布越均匀、数量密度越高,对抑制合金再结晶的作用越强,获得的亚晶晶粒越细小均匀。同时Al₃Zr相的分布会影响锻件的时效效果,当Al₃Zr相越细小、分布越密集,材料中MgZn₂过渡相对应的峰时效时间会提前,采用相同的T74时效制度,相应锻板的过时效时间延长,导致其力学强度降低较多。

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关键词: 7050锻板 Al₃Zr弥散相拉伸性能断裂韧性时效相

Abstract: In this paper, 7050 aluminum alloy ingots with different Al₃Zr precipitation conditions were obtained by using different homogenization processes and controlling the addition of Zr elements. The tensile properties and fracture toughness of 7050-T74 forged plates affected by Al₃Zr dispersoids were systematically studied. It is shown that the more uniform distribution and higher numberr density of the Al₃Zr dispersoids, the stronger the recrystallization inhibition effect, and the finer and more uniform subgrains could be obtained. At the same time, the distribution of Al₃Zr dispersoids could affect material's precipitation formation during the aging process. When Al₃Zr dispersoid size is finer and number density is higher, the peak aging time of the η′ phase in 7050 alloy material will be advanced, using the same T74 aging procedure, 7050 forging plate's strength would be decreased significantly.

Key words: 7050 forging plate Al₃Zr dispersoids tensile property fracture toughness aging precipitates

发布日期: 2020-07-01

ZTFLH:

TG146.2+1

作者简介: 宋韦韦,2015年8月毕业于美国密西西比州立大学,获得博士学位,博士期间主要的研究内容为高强耐蚀镁合金、铝合金组织与性能调控及成型工艺,以第一作者在国外SCI学术期刊上发表论文3篇,参与发表期刊3篇。2015年至今,就职于山东南山铝业股份有限公司研究院,主要负责航空锻件产品的加工工艺以及组织性能控制研究。

引用本文:

宋韦韦, 罗顺成, 韩兆玉, 晁代义, 方清万, 吕正风, 程仁策. 7050铝合金铸锭中Al₃Zr的析出情况对锻板性能的影响[J]. 材料导报, 2020, 34(Z1): 334-337.
SONG Weiwei, LUO Shuncheng, HAN Zhaoyu, CHAO Daiyi, FANG Qingwan, LYU Zhengfeng, CHENG Rence. Effects of Al₃Zr Dispersoids on Mechanical Properties of 7050Forging Plates. Materials Reports, 2020, 34(Z1): 334-337.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ1/334

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