Microstructure and mechanical properties of double-sided welded joints in MX246A high-temperature alloy

Jianmin Li; Dongyun Zhang; Shuo Geng; Yujing Chi; Denghao Yi

doi:10.1117/12.2685437

27 November 2023 Microstructure and mechanical properties of double-sided welded joints in MX246A high-temperature alloy

Jianmin Li, Dongyun Zhang, Shuo Geng, Yujing Chi, Denghao Yi

Author Affiliations +

Proceedings Volume 12762, Advanced Laser Processing and Manufacturing VII; 127620T (2023) https://doi.org/10.1117/12.2685437
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

In this paper, the microstructure and properties of MX246A alloy laser double-sided welding were studied. Different alloy welding structures were obtained under different laser powers, and the fine-grain zone, columnar-grain zone, and equiaxed-grain zone in the welding structure were analyzed. According to the results of SEM, it was found that the width of the surface fine-grain zone was generally thin, which had little effect on the quality and properties of the welded joint. The quality and properties of the welded joint mainly depended on the proportion of columnar-grain zone and equiaxed- grain zone, as well as the grain size. Moreover, with the increase of laser power density, the number of columnar grains decreased, while the number of equiaxed grains increased. The grain size of equiaxed grains became smaller, and the structure became denser, resulting in better mechanical properties. The double-sided welding was subjected to high-temperature and room-temperature tensile tests. The Laser welding double-sided tensile properties test showed that the tensile strength was 555 MPa at room temperature and 400 MPa at 1000 °C under the laser power intensity of 1704 W/mm² . The study revealed that MX246A alloy exhibited superior tensile properties and microhardness than the substrate, while the microstructure demonstrated excellent high-temperature durability.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jianmin Li, Dongyun Zhang, Shuo Geng, Yujing Chi, and Denghao Yi "Microstructure and mechanical properties of double-sided welded joints in MX246A high-temperature alloy", Proc. SPIE 12762, Advanced Laser Processing and Manufacturing VII, 127620T (27 November 2023); https://doi.org/10.1117/12.2685437

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available