Effect of the structure and the phase composition on the mechanical properties of Al–Cu–Li alloy laser welds

Effect of the structure and the phase composition on the mechanical properties of Al–Cu–Li alloy laser welds Full article

Journal

Materials Science and Engineering A
ISSN: 0921-5093

Output data

Year: 2021, Volume: 809, Pages: 140947 Pages count : 1 DOI: 10.1016/j.msea.2021.140947

Tags

Aluminum-lithium alloy; High resolution electron microscopy; Laser welding; Phase analysis; Structure; Synchrotron X-ray diffractometry

Authors

Malikov Alexander ¹ , Orishich Anatoliy ¹ , Vitoshkin Igor ¹ , Bulina Natalia ³ , Karpov Evgenij ^1,2 , Gutakovskii Anton ⁴ , Batsanov Stepan ⁴ , Ancharov Alexey ^3,5 , Tabakaev Roman ⁶

Affiliations

1	Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
2	Lavrentyev Institute of Hydrodynamics
3	Institute of Solid State Chemistry and Mechanochemistry of SB RAS
4	Rzhanov Institute of Semiconductor Physics SB RAS
5	Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences
6	National Research Tomsk Polytechnic University

Funding (2)

1	Министерство науки и высшего образования Российской Федерации	FWGG-2021-0012
2	Министерство науки и высшего образования Российской Федерации	075-15-2020-781

The purpose of these investigations was to study the effect of heat treatment on the structure and the phase composition of laser welded joints of the Al-2.8Cu-1.7Li alloy (V-1461 grade), providing the maximum tensile strength. To study the phase composition of the weld metal, synchrotron radiation was applied using a ‘Mega Science' facility. This enabled to assess the phase distribution across the weld metal before and after heat treatment. It was found using high-resolution scanning and transmission electron microscopy, energy dispersive X-ray analysis, and synchrotron X-ray diffractometry that the T1(Al2CuLi) and T2(Al6CuLi3) main phases had been formed in the weld metal and at the interfaces with the matrix. Ultimate tensile strength of the welded joints was about 341 MPa, which was 62% of that of the base metal. Subsequent heat treatment of the welded samples, included hardening and artificial aging, caused the homogenization of the Al–Cu–Li alloy solid solution, as well as the formation of the δ′(Al3Li) hardening phase. Also, the T1 and T2 phases were formed partially. After quenching, tensile strength of the welded joints improved and was about 85% of that of the base metal. After artificial aging, it was about 510 MPa and approached tensile strength of the base metal (93%).

Malikov A. , Orishich A. , Vitoshkin I. , Bulina N. , Karpov E. , Gutakovskii A. , Batsanov S. , Ancharov A. , Tabakaev R.
Effect of the structure and the phase composition on the mechanical properties of Al–Cu–Li alloy laser welds
Materials Science and Engineering A. 2021. V.809. P.140947. DOI: 10.1016/j.msea.2021.140947 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000665076400004
Scopus:	2-s2.0-85101707830
Elibrary:	46760500
OpenAlex:	W3129635019

DB	Citing
Scopus	15
OpenAlex	14
Elibrary	15
Web of science	10