Pit growth kinetics of additively manufactured MoNi over-alloyed type 316L stainless steel

Yiqi Zhou; Decheng Kong; Li Wang; Ruixue Li; Xiaoqing Ni; Man Cheng; Chaofang Dong; Dirk Engelberg

doi:10.1016/j.jmrt.2023.11.210

Pit growth kinetics of additively manufactured MoNi over-alloyed type 316L stainless steel

Yiqi Zhou, Decheng Kong, Li Wang, Ruixue Li, Xiaoqing Ni, Man Cheng, Chaofang Dong, Dirk Engelberg

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The microstructure of wrought, laser powder bed fusion (LPBF), and MoNi over-alloyed LPBF type 316L stainless steel is compared. Adding Mo and Ni to LPBF 316L stainless steel resulted in ẟ-ferrite. Potentio-dynamic polarisation was used to rank all microstructures, with LPBF + MoNi has more resistant than LPBF and wrought material. Bipolar electrochemistry was applied, with LPBF samples having the lowest critical pitting potential and highest pit growth kinetics. The best corrosion performance was for LPBF + MoNi stainless steel. Different pitting corrosion resistance as function of process directions were found. The tiny pores negatively impacted the pitting performance.

Original language	English
Journal	Journal of Materials Research and Technology
Early online date	26 Nov 2023
DOIs	https://doi.org/10.1016/j.jmrt.2023.11.210
Publication status	E-pub ahead of print - 26 Nov 2023

Keywords

Laser powder bed fusion
stainless steel
bipolar electrochemistry
pitting corrosion
gas pores

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jmrt.2023.11.210Licence: CC BY

Cite this

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title = "Pit growth kinetics of additively manufactured MoNi over-alloyed type 316L stainless steel",

abstract = "The microstructure of wrought, laser powder bed fusion (LPBF), and MoNi over-alloyed LPBF type 316L stainless steel is compared. Adding Mo and Ni to LPBF 316L stainless steel resulted in ẟ-ferrite. Potentio-dynamic polarisation was used to rank all microstructures, with LPBF + MoNi has more resistant than LPBF and wrought material. Bipolar electrochemistry was applied, with LPBF samples having the lowest critical pitting potential and highest pit growth kinetics. The best corrosion performance was for LPBF + MoNi stainless steel. Different pitting corrosion resistance as function of process directions were found. The tiny pores negatively impacted the pitting performance.",

keywords = "Laser powder bed fusion, stainless steel, bipolar electrochemistry, pitting corrosion, gas pores",

author = "Yiqi Zhou and Decheng Kong and Li Wang and Ruixue Li and Xiaoqing Ni and Man Cheng and Chaofang Dong and Dirk Engelberg",

year = "2023",

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doi = "10.1016/j.jmrt.2023.11.210",

language = "English",

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TY - JOUR

T1 - Pit growth kinetics of additively manufactured MoNi over-alloyed type 316L stainless steel

AU - Zhou, Yiqi

AU - Kong, Decheng

AU - Wang, Li

AU - Li, Ruixue

AU - Ni, Xiaoqing

AU - Cheng, Man

AU - Dong, Chaofang

AU - Engelberg, Dirk

PY - 2023/11/26

Y1 - 2023/11/26

N2 - The microstructure of wrought, laser powder bed fusion (LPBF), and MoNi over-alloyed LPBF type 316L stainless steel is compared. Adding Mo and Ni to LPBF 316L stainless steel resulted in ẟ-ferrite. Potentio-dynamic polarisation was used to rank all microstructures, with LPBF + MoNi has more resistant than LPBF and wrought material. Bipolar electrochemistry was applied, with LPBF samples having the lowest critical pitting potential and highest pit growth kinetics. The best corrosion performance was for LPBF + MoNi stainless steel. Different pitting corrosion resistance as function of process directions were found. The tiny pores negatively impacted the pitting performance.

AB - The microstructure of wrought, laser powder bed fusion (LPBF), and MoNi over-alloyed LPBF type 316L stainless steel is compared. Adding Mo and Ni to LPBF 316L stainless steel resulted in ẟ-ferrite. Potentio-dynamic polarisation was used to rank all microstructures, with LPBF + MoNi has more resistant than LPBF and wrought material. Bipolar electrochemistry was applied, with LPBF samples having the lowest critical pitting potential and highest pit growth kinetics. The best corrosion performance was for LPBF + MoNi stainless steel. Different pitting corrosion resistance as function of process directions were found. The tiny pores negatively impacted the pitting performance.

KW - Laser powder bed fusion

KW - stainless steel

KW - bipolar electrochemistry

KW - pitting corrosion

KW - gas pores

U2 - 10.1016/j.jmrt.2023.11.210

DO - 10.1016/j.jmrt.2023.11.210

M3 - Article

SN - 2238-7854

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

ER -

Pit growth kinetics of additively manufactured MoNi over-alloyed type 316L stainless steel

Abstract

Keywords

UN SDGs

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