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Title: Corrosion properties of powder bed fusion additively manufactured 17-4 PH stainless steel

The corrosion susceptibility of a laser powder bed fusion (LPBF) additively manufactured alloy, UNS S17400 (17-4 PH), was explored compared to conventional wrought material. Microstructural characteristics were characterized and related to corrosion behavior in quiescent, aqueous 0.6 M NaCl solutions. Electrochemical measurements demonstrated that the LPBF 17-4 PH alloy exhibited a reduced passivity range and active corrosion compared to its conventional wrought counterpart. Lastly, a micro-electrochemical cell was employed to further understand the effects of the local scale and attributed the reduced corrosion resistance of the LPBF material to pores with diameters ≥ 50 µm.
Authors:
 [1] ;  [1] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2016-12748J
Journal ID: ISSN 0010-9312; 650008
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Corrosion
Additional Journal Information:
Journal Volume: 73; Journal Issue: 7; Journal ID: ISSN 0010-9312
Publisher:
NACE International
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; porosity; additive manufacturing (AM); micro-electrochemical cell; crevice corrosion; powder metallurgy
OSTI Identifier:
1345535