Influence of Quenching and Subsequent Artificial Aging on Tensile Strength of Laser-Welded Joints of Al–Cu–Li Alloy | Sciact - CRIS-system of Boreskov Institute of Catalysis

Influence of Quenching and Subsequent Artificial Aging on Tensile Strength of Laser-Welded Joints of Al–Cu–Li Alloy Full article

Journal

Metals
, E-ISSN: 2075-4701

Output data

Year: 2023, Volume: 13, Number: 8, Article number : 1393, Pages count : 22 DOI: 10.3390/met13081393

Tags

laser welding; aluminum-lithium alloy; scanning electron microscopy; synchrotron radiation; X-ray diffractometry; mechanical properties

Authors

Malikov Alexandr ¹ , Karpov Evgeniy ^1,2 , Kuper Konstantin ^1,3 , Shmakov Alexandr ^1,4

Affiliations

1	Khristianovich Institute of Theoretical and Applied Mechanics, SB RAS, 4/1 Institutskaya Str., 630090 Novosibirsk, Russia
2	Lavrentyev Institute of Hydrodynamics, SB RAS, Lavrentyev Ave. 15, 630090 Novosibirsk, Russia
3	Budker Institute of Nuclear Physics, SB RAS, Lavrentyev Ave. 11, 630090 Novosibirsk, Russia
4	Boreskov Institute of Catalysis, SB RAS, Lavrentyev Ave. 5, 630090 Novosibirsk, Russia

Funding (1)

Russian Science Foundation

23-79-00037

The research aim was to optimize post-weld heat-treatment (PWHT) modes for a laser-welded joint of the Al–Cu–Li alloy and improve their respective strength properties. As a result, the ultimate tensile strength, yield point, and elongation of the joint were enhanced up to 95%, 94%, and 38%, respectively, of those inherent in the base metal. Before and after PWHT, both microstructures and phase compositions have been examined by optical and scanning electron microscopy, as well as synchrotron X-ray diffractometry. In the as-welded metal, the α-Al and T1(Al2CuLi) phases were found, along with the θ′(Al2Cu) and S′(Al2CuMg) phases localized at the grain boundaries, significantly reducing the mechanical properties of the joint. Upon quenching, the agglomerates dissolved at the grain boundaries, the solid solution was homogenized, and both Guinier–Preston zones and precipitates of the intermediate metastable θ″ phase were formed. After subsequent optimal artificial aging, the (predominant) hardening θ′ and (partial) T1(Al2CuLi) phases were observed in the weld metal, which contributed to the improvement of the strength properties of the joint.

Malikov A. , Karpov E. , Kuper K. , Shmakov A.
Influence of Quenching and Subsequent Artificial Aging on Tensile Strength of Laser-Welded Joints of Al–Cu–Li Alloy
Metals. 2023. V.13. N8. 1393 :1-22. DOI: 10.3390/met13081393 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Jul 6, 2023
Accepted:	Aug 1, 2023
Published print:	Aug 3, 2023
Published online:	Aug 3, 2023

Web of science:	WOS:001055323300001
Scopus:	2-s2.0-85169119202
Elibrary:	54654404
Chemical Abstracts:	2023:1847139
OpenAlex:	W4385543185

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