Cargando…

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical p...

Descripción completa

Detalles Bibliográficos
Autores principales: Ku, Ming-Hsiang, Tsao, Lung-Chuan, Tsai, Yu-Jin, Lin, Zih-Jie, Wu, Ming-Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9410167/
https://www.ncbi.nlm.nih.gov/pubmed/36013618
http://dx.doi.org/10.3390/ma15165483
_version_ 1784775028700610560
author Ku, Ming-Hsiang
Tsao, Lung-Chuan
Tsai, Yu-Jin
Lin, Zih-Jie
Wu, Ming-Wei
author_facet Ku, Ming-Hsiang
Tsao, Lung-Chuan
Tsai, Yu-Jin
Lin, Zih-Jie
Wu, Ming-Wei
author_sort Ku, Ming-Hsiang
collection PubMed
description Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical properties, and corrosion resistances of PM 304L austenitic, 410L ferritic, and 410 martensitic stainless steels were investigated. The results showed that adding 0.6 wt% B significantly improved the sintered densities of the three kinds of stainless steels due to the liquid phase sintering (LPS) phenomenon. The borides in 304L + 0.6B, 410L + 0.6B, and 410 + 0.6B were rich in B and Cr atoms but deficient in Fe, Ni, or C atoms, as analyzed by electron probe micro-analysis. Furthermore, the B additive contributed to the improved apparent hardness and corrosion resistance of PM stainless steels. In the 410L stainless steel, the 0.6 wt% B addition increased the corrosion voltage from −0.43 V(SCE) to −0.24 V(SCE) and reduced the corrosion current density from 2.27 × 10(−6) A/cm(2) to 1.93 × 10(−7) A/cm(2). The effects of several factors, namely: porosity; the generation of boride; the matrix/boride interfacial areas; Cr depletion; and the microstructure on the corrosion performances are discussed. The findings clearly indicate that porosity plays a predominant role in the corrosion resistances of PM austenitic, ferritic, and martensitic stainless steels.
format Online
Article
Text
id pubmed-9410167
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-94101672022-08-26 Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering Ku, Ming-Hsiang Tsao, Lung-Chuan Tsai, Yu-Jin Lin, Zih-Jie Wu, Ming-Wei Materials (Basel) Article Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical properties, and corrosion resistances of PM 304L austenitic, 410L ferritic, and 410 martensitic stainless steels were investigated. The results showed that adding 0.6 wt% B significantly improved the sintered densities of the three kinds of stainless steels due to the liquid phase sintering (LPS) phenomenon. The borides in 304L + 0.6B, 410L + 0.6B, and 410 + 0.6B were rich in B and Cr atoms but deficient in Fe, Ni, or C atoms, as analyzed by electron probe micro-analysis. Furthermore, the B additive contributed to the improved apparent hardness and corrosion resistance of PM stainless steels. In the 410L stainless steel, the 0.6 wt% B addition increased the corrosion voltage from −0.43 V(SCE) to −0.24 V(SCE) and reduced the corrosion current density from 2.27 × 10(−6) A/cm(2) to 1.93 × 10(−7) A/cm(2). The effects of several factors, namely: porosity; the generation of boride; the matrix/boride interfacial areas; Cr depletion; and the microstructure on the corrosion performances are discussed. The findings clearly indicate that porosity plays a predominant role in the corrosion resistances of PM austenitic, ferritic, and martensitic stainless steels. MDPI 2022-08-09 /pmc/articles/PMC9410167/ /pubmed/36013618 http://dx.doi.org/10.3390/ma15165483 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ku, Ming-Hsiang
Tsao, Lung-Chuan
Tsai, Yu-Jin
Lin, Zih-Jie
Wu, Ming-Wei
Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title_full Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title_fullStr Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title_full_unstemmed Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title_short Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering
title_sort improved mechanical and corrosion properties of powder metallurgy austenitic, ferritic, and martensitic stainless steels by liquid phase sintering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9410167/
https://www.ncbi.nlm.nih.gov/pubmed/36013618
http://dx.doi.org/10.3390/ma15165483
work_keys_str_mv AT kuminghsiang improvedmechanicalandcorrosionpropertiesofpowdermetallurgyausteniticferriticandmartensiticstainlesssteelsbyliquidphasesintering
AT tsaolungchuan improvedmechanicalandcorrosionpropertiesofpowdermetallurgyausteniticferriticandmartensiticstainlesssteelsbyliquidphasesintering
AT tsaiyujin improvedmechanicalandcorrosionpropertiesofpowdermetallurgyausteniticferriticandmartensiticstainlesssteelsbyliquidphasesintering
AT linzihjie improvedmechanicalandcorrosionpropertiesofpowdermetallurgyausteniticferriticandmartensiticstainlesssteelsbyliquidphasesintering
AT wumingwei improvedmechanicalandcorrosionpropertiesofpowdermetallurgyausteniticferriticandmartensiticstainlesssteelsbyliquidphasesintering