Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints

Li, Zhen; Zhao, Wei; Yu, Kedong; Guo, Ning; Gao, Song

doi:10.3390/met12101570

Open AccessArticle

Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints

by

Zhen Li

^1,2,

Wei Zhao

^1,2,*,

Kedong Yu

^1,2,

Ning Guo

^1,2 and

Song Gao

^1,2

¹

College of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China

²

Shandong Institute of Mechanical Design and Research, Jinan 250031, China

^*

Author to whom correspondence should be addressed.

Metals 2022, 12(10), 1570; https://doi.org/10.3390/met12101570

Submission received: 26 August 2022 / Revised: 18 September 2022 / Accepted: 20 September 2022 / Published: 21 September 2022

(This article belongs to the Special Issue Research on Corrosion and Protection Technology of Metal Matrix Composite)

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Abstract

The TA1 welded joints with different heat inputs were obtained by a fiber laser and their microstructure, mechanical properties and corrosion resistance in simulated saliva solution were studied. The results show that the microstructure in fusion zone (FZ) is needle-like α′ martensite and lath-shape α′ martensite, and that of the heat-affected zone (HAZ) is zigzag α phase. With the increase of heat input, the volume fraction of needle-like α′ martensite decrease and the microstructure is coarsened in FZ, but there is almost no change in the microstructure of the HAZ. The order of the corrosion resistance of welded joints with different heat inputs is the same as FZ > HAZ > base material (BM), and the heat input has a more influence on the corrosion resistance of FZ. The binary multiple linear regression relationship between the corrosion current density/charge transfer resistance and the length/width of α′ martensite was established, indicating that the width of α′ martensite is the main factor affecting the corrosion resistance.

Keywords: CP-Ti; laser beam welding; heat input; microstructure; corrosion resistance

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MDPI and ACS Style

Li, Z.; Zhao, W.; Yu, K.; Guo, N.; Gao, S. Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints. Metals 2022, 12, 1570. https://doi.org/10.3390/met12101570

AMA Style

Li Z, Zhao W, Yu K, Guo N, Gao S. Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints. Metals. 2022; 12(10):1570. https://doi.org/10.3390/met12101570

Chicago/Turabian Style

Li, Zhen, Wei Zhao, Kedong Yu, Ning Guo, and Song Gao. 2022. "Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints" Metals 12, no. 10: 1570. https://doi.org/10.3390/met12101570

APA Style

Li, Z., Zhao, W., Yu, K., Guo, N., & Gao, S. (2022). Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints. Metals, 12(10), 1570. https://doi.org/10.3390/met12101570

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Effect of Heat Input on Microstructure and Corrosion Resistance of CP-Ti Laser Beam Welded Joints

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