Ameliorating dilution of Cr and Ni and improving PWSCC resistance of 52 M overlay by hot wire plasma arc cladding

Xinhe Xu; Deng Pan; Kun Zhang; Zhanpeng Lu; Sergio Lozano-Perez; Tongming Cui; Junjie Chen; Shuangyan Li; Maolong Zhang; Tetsuo Shoji

Journal of Materials Research and Technology (Jul 2024)

Ameliorating dilution of Cr and Ni and improving PWSCC resistance of 52 M overlay by hot wire plasma arc cladding

Xinhe Xu,
Deng Pan,
Kun Zhang,
Zhanpeng Lu,
Sergio Lozano-Perez,
Tongming Cui,
Junjie Chen,
Shuangyan Li,
Maolong Zhang,
Tetsuo Shoji

Affiliations

Xinhe Xu: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China
Deng Pan: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China
Kun Zhang: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China
Zhanpeng Lu: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China; Corresponding author. Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China.
Sergio Lozano-Perez: Department of Materials, University of Oxford, Parks Road, OX1 3PH, Oxford, UK
Tongming Cui: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China; Corresponding author. Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China.
Junjie Chen: Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China; State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, China
Shuangyan Li: Shanghai Electric Nuclear Power Group, Shanghai, 201306, China
Maolong Zhang: Shanghai Electric Nuclear Power Group, Shanghai, 201306, China
Tetsuo Shoji: New Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8579, Japan

Journal volume & issue: Vol. 31
pp. 1392 – 1408

Abstract

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The multi-scale chemical composition distribution and microstructure of Alloy 52 M overlay on low alloy steel by hot wire plasma arc cladding (HWPC) were characterized. Stress corrosion cracking (SCC) growth rates were quantified in the dilution zone (DZ) near the fusion boundary and in the bulk of Alloy 52 M using compact tension samples with a thickened cladding overlay. The DZ of the Alloy 52 M side exhibited a single macroscopic dilution zone containing approximately 27–28 wt% Cr and 50 wt% Ni, in contrast to the multiple dilution zones observed in the DZ of Alloy 52 M overlays or joints prepared using other welding technologies such as submerged arc welding (SMAW). The DZ of the HWPC overlay exhibited less dilution of Cr and Ni compared to SMAW weldment. This resulted in a shorter average SCC band and fewer local intergranular cracks in the DZ of HWPC, as observed from SCC crack growth rate specimens tested in simulated PWR primary water at 325 °C and 350 °C. These findings highlight the advantages of utilizing HWPC to enhance SCC resistance in the DZ of Alloy 52 M overlays over conventional cladding technologies.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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