Microstructure, Mechanical, and Corrosion Properties of Ni-Free Austenitic Stainless Steel Prepared by Mechanical Alloying and HIPping

Eliza Romańczuk , Krzysztof Perkowski , Zbigniew Oksiuta

Abstract

An influence of the powder metallurgy route on the phase structure, mechanical properties, and corrosion resistance of Fe–18%Cr–12%Mn–N nickel-free austenitic stainless steel as a potential material for medical applications were studied. The powder was mechanically alloyed in a high purity nitrogen atmosphere for 90 h followed by Hot Isostatic Pressing at 1150 °C (1423 K) and heat treatment at 1175 °C (1423 K) for 1 h in a vacuum with furnace cooling and water quenching. More than 96% of theoretical density was obtained for the samples after Hot Isostatic Pressing that had a direct influence on the tensile strength of the tested samples (Ultimate Tensile Strength is 935 MPa) with the total elongation of 0.5%. Heat treatment did not affect the tensile strength of the tested material, however, an elongation was improved by up to 3.5%. Corrosion properties of the tested austenitic stainless steel in various stages of the manufacturing process were evaluated applying the anodic polarization measurements and compared with the austenitic 316LV stainless steel. In general, the heat treatment applied after Hot Isostatic Pressing improved the corrosion resistance. The Hot Isostatic Pressing sample shows dissolution, while heat treatment causes a passivity range, the noblest corrosion potential, and lower current density of this sample.
Author Eliza Romańczuk (FME / DMPE)
Eliza Romańczuk,,
- Department of Material and Production Engineering
, Krzysztof Perkowski
Krzysztof Perkowski,,
-
, Zbigniew Oksiuta (FME / DMPE)
Zbigniew Oksiuta,,
- Department of Material and Production Engineering
Journal seriesMaterials, ISSN 1996-1944, (N/A 140 pkt)
Issue year2019
Vol12
No20
Pages1-23
Publication size in sheets1.1
Keywords in Englishnickel free austenitic stainless steel, mechanical alloying, Hot Isostatic Pressing, mechanical properties, corrosion resistance
ASJC Classification2500 General Materials Science
DOIDOI:10.3390/ma12203416
URL https://www.mdpi.com/1996-1944/12/20/3416
Internal identifierROC 19-20
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.285; WoS Impact Factor: 2018 = 2.972 (2) - 2018=3.532 (5)
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