Effects of microstructure on tensile properties of AA2050-T84 Al-Li alloy

被引：27

作者：

Lu, Ding-ding ^{[1
]}

Li, Jin-feng ^{[1
]}

Ning, Hong ^{[1
]}

Ma, Peng-cheng ^{[2
]}

Chen, Yong-lai ^{[2
]}

Zhang, Xu-hu ^{[2
]}

Zhang, Kai ^{[3
]}

Li, Jian-mei ^{[4
]}

Zhang, Rui-feng ^{[1
,4
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China

[3] Monash Univ, Monash Ctr Addit Mfg, Clayton, Vic 3800, Australia

[4] Ningxia Univ, Sch Chem & Chem Engn, Yinchuan 750021, Ningxia, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2021年 / 31卷 / 05期

基金：

中国国家自然科学基金;

关键词：

2050 Al-Li alloy; tensile properties; anisotropy; precipitate; texture; CRACK PROPAGATION BEHAVIOR; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; GRAIN-STRUCTURE; YIELD STRENGTH; CU; ANISOTROPY; MG; CORROSION; TEXTURE;

D O I：

10.1016/S1003-6326(21)65571-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of microstructure evolution on the tensile properties of 2050 Al-Li alloy thick plate aged at 150 degrees C with 80 mm in thickness (t) was studied from a microstructural perspective. Scanning electron microscope, optical microscope, transmission electron microscope and X-ray diffractometer were used to explore the surface (t/6), interlayer (t/3) and center (t/2) thickness layer of this alloy. Results show that the secondary phases on grain boundaries, precipitates and textures vary depending on the thickness location. The precipitation strengthening has a stronger influence on the alloy along the rolling direction than the transverse direction from the under-aged to the peak-aging condition; however, its effect on the anisotropy is insignificant. The higher Taylor factor (Al) value caused by stronger beta fiber rolling textures and the intergranular phases is the main reason that leads to the highest strength at the t/2 position along the rolling direction. The M-value has a limited change at different thickness layers along the transverse direction, which causes the same tensile strength.

引用

页码：1189 / 1204

页数：16