Improved corrosion resistance of nickel-aluminum bronze by electron beam powder bed fusion

Improved corrosion resistance of nickel-aluminum bronze by electron beam powder bed fusion

The corrosion resistance of nickel-aluminum bronze (NAB) by electron beam powder bed fusion (EB-PBF) from different-size feeding particles is investigated in neutral 3.5 wt% NaCl solutions. Uniformly-distributed precipitates are observed in the samples at the microscale. The βˊ phase that suffered f...

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Bibliographic Details
Main Authors: Zhai, Wenzheng, Li, Junjie, Zhou, Runhua, Sun, Aidong, Yan, Shuoqing, Wang, Guilan, Zhang, Haiou
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2023
Subjects:
Engineering::Mechanical engineering
Additive Manufacturing
Nickel-Aluminum Bronze
Online Access:https://hdl.handle.net/10356/172277
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Institution: Nanyang Technological University
Language: English
Description
Summary:The corrosion resistance of nickel-aluminum bronze (NAB) by electron beam powder bed fusion (EB-PBF) from different-size feeding particles is investigated in neutral 3.5 wt% NaCl solutions. Uniformly-distributed precipitates are observed in the samples at the microscale. The βˊ phase that suffered from corrosion preferentially in conventional as-casting NAB is not observed in the EB-PBF NAB. Typically, the corrosion resistance of EB-PBF NAB built from middle-size particles is improved by 1.35 times that of as-casting NAB. This results from a collective effect of high relative density and uniformly-distributed precipitates, which mitigates selective phase corrosion and promotes the formation of corrosion products with uniform thickness.

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