李劲风,陈永来,张绪虎,刘晴,郑子樵,姚勇,王剑.一种新型超高强铝锂合金板材的组织与力学性能[J].稀有金属材料与工程,2017,46(12):3715~3720.[Li Jin-feng,Chen Yong-lai,Zhang Xu-hu,Liu Qing,Zheng Zi-qiao,Yao Yong,Wang Jian.Structures and Mechanical properties of a super-high strength Al-Li alloy[J].Rare Metal Materials and Engineering,2017,46(12):3715~3720.]
一种新型超高强铝锂合金板材的组织与力学性能
投稿时间:2015-09-28  修订日期:2015-11-12
中文关键词:  铝锂合金  强度  微观组织  织构
基金项目:863项目(项目号2013AA032401),中南大学教师基金(项目号2013JSJJ 001)
中文摘要:
      研究了课题组开发的一种新型超高强铝锂合金的组织与力学性能。结果表明:该合金具有优异的常规力学性能,典型T8热处理时抗拉强度600 MPa以上,延伸率超过10%。10 mm厚热轧板材及2 mm厚冷轧薄板T8峰时效(150oC)时析出强化相相均为T1相(Al2CuLi)与q¢相(Al2Cu),且两种厚度板材中析出相分数和尺寸均相当,但10 mm厚热轧板材T8峰时效抗拉强度比2 mm厚冷轧薄板高50~70 MPa左右。力学性能的差异主要来源于固溶处理后变形织构分数的不同;经固溶处理后10 mm厚热轧板材变形织构体积分数远高于2 mm冷轧薄板。
Structures and Mechanical properties of a super-high strength Al-Li alloy
英文关键词:Al-Li alloy  strength  micro-structure  deformation texture
英文摘要:
      The structures and mechanical properties of a new super-high strength Al-Li alloy developed by this group were investigated. The alloy possessed excellent properties, of which the tensile strength was greater than 600 MPa, and the elongation higher than 10%. After T8 aging, the strengthening precipitates in both cold-rolled sheet with 2 mm thickness and hot-rolled plate with 10 mm thickness were T1(Al2CuLi) and q¢(Al2Cu), and their fraction and size were basically same in the two plates with different thickness. The strength of T8-aged plate with 10 mm thickness was 50~70 MPa higher than that the T8-aged sheet with 2 mm thickness. This strength enhancement was originated from the texture fraction after solution treatment. The volume fraction of the deformation texture in the solutionized hot-rolled plate with 10 mm thickness was much higher.
作者单位E-mail
李劲风 中南大学材料科学与工程学院 lijinfeng@csu.edu.cn 
陈永来 航天材料及工艺研究所  
张绪虎 航天材料及工艺研究所  
刘晴 中南大学材料科学与工程学院  
郑子樵 中南大学材料科学与工程学院  
姚勇 西南铝业集团有限责任公司  
王剑 西南铝业集团有限责任公司  
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