[1]孙 达,钱沙,高 崇,等.铝锂合金显微组织特征及其对力学性能的影响[J].焊管,2021,44(10):13-18,23.[doi:10.19291/j.cnki.1001-3938.2021.10.003]
　SUN Da,QIAN Shasha,GAO Chong,et al.Microstructural Characteristics of Al-Li Alloys and Effect on Mechanical Properties[J].,2021,44(10):13-18,23.[doi:10.19291/j.cnki.1001-3938.2021.10.003]
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铝锂合金显微组织特征及其对力学性能的影响()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
第44卷
期数:
2021年第10期
页码:
13-18,23
栏目:
试验与研究
出版日期:
2021-10-28

文章信息/Info

Title:
Microstructural Characteristics of Al-Li Alloys and Effect on Mechanical Properties
文章编号:
10.19291/j.cnki.1001-3938.2021.10.003
作者:
孙 达; 钱沙; 高 崇; 朱志; 单梦蝶; 蔡养
1. 天津理工大学 材料科学与工程学院，天津300384；2. 中铝材料应用研究院有限公司，北京 102200；3. 航天工程装备（苏州）有限公司，江苏 苏州 201100
Author(s):
SUN Da;  QIAN Shasha;  GAO Chong;  ZHU Zhixiong;  SHAN Mengdie;  CAI Yangchuan
1. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;2. Chinalco Materials Application Research Institute Co., Ltd., Beijing 102200, China;3. Aerospace Engineering Equipment （Suzhou） Co., Ltd., Suzhou 201100, Jiangsu, China
关键词:
铝锂合金; 力学性能; 析出物; 显微组织; 轧制
Keywords:
Al-Li alloy;  mechanical property;  precipitate;  microstrusture;  rolling
分类号:
TG146
DOI:
10.19291/j.cnki.1001-3938.2021.10.003
文献标志码:
A
摘要:
为了明确第三代铝锂合金的显微组织与力学性能之间的关系，利用光学显微镜和透射电子显微镜对三种新开发的铝锂合金（2A97-T8、2198-T8和2060-T8）的显微组织进行了定量评价，并用拉伸和硬度试验研究了其对力学性能的影响。结果表明，2060-T8、2A97-T8和2198-T8铝锂合金的显微组织是典型的轧制组织；铝锂合金的主要析出物为T1（Al2CuLi）、δ′（Al3Li）、S′（Al2CuMg）和 θ′（Al2Cu），铝锂合金析出相体积分数的增加可显著提高其显微硬度和抗拉强度，铝锂合金中析出相的数量和种类可以显著影响面内各项异性；2A97-T8和2198-T8合金的断裂模式为韧脆混合断裂，而2060-T8合金为韧性断裂。
Abstract:
In order to clarify the relationship between microstructure and mechanical properties of the third generation Al-Li alloy, quantitative evaluations of three recently developed Al-Li alloys (2A97-T8, 2198-T8 and 2060-T8) microstructure were carried out by using OM (optical microscope) and TEM (transmission electron microscopy). The influences on mechanical properties were studied by using tensile and hardness testing machine. Results show that the microstructures of 2060-T8, 2A97-T8 and 2198-T8 Al-Li alloy were typical rolling microstructures. The main precipitates of Al-Li alloys were T1 （Al2CuLi）, δ′（Al3Li）, S′（Al2CuMg） and θ′（Al2Cu）. The increased volume fraction of Al-Li alloys precipitates can significantly raise its micro-hardness and tensile strength. The IPA （in-plane anisotropy） can be significantly affected by the amounts and types of precipitates in Al-Li alloys. Fracture modes were ductile-brittle mixed fractures for 2A97-T8 and 2198-T8 alloys; while ductile fracture for 2060-T8 alloy.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2021-04-30作者简介：孙 达（1997—），男，硕士研究生，天津理工大学材料与工程学院，从事高熵合金研究。
更新日期/Last Update: 2021-10-28