Effects of debinding and sintering atmosphere on properties and corrosion resistance of powder injection molded 316 L - Stainless steel

Muhammad Rafi Raza, Faiz Ahmad, Norhamidi Muhamad, Abu Bakar Sulong, M. A. Omar, Majid Niaz Akhtar, Muhammad Aslam, Irfan Sherazi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

316L stainless steel is a common biomedical material. Currently, biomedical parts are produced through powder injection molding (PIM). Carbon control is the most critical in PIM. Improper debinding can significantly change the properties of the final product. In this work, thermal debinding and sintering were performed in two different furnaces (i.e. laboratory and commercially available furnaces) to study the mechanical properties and corrosion resistance. Debounded samples were sintered in different atmospheres. The samples sintered in inert gas showed enhanced mechanical properties compared with wrought 316L stainless steel and higher corrosion rate than those sintered in the vacuum furnace. The densification and tensile strength of the hydrogen sintered samples increased up to 3% and 51%, respectively, compared with those of the vacuum-sintered samples. However, the samples sintered in inert gas also exhibited reduced ductility and corrosion resistance. This finding is attributed to the presence of residual carbon in debonded samples during debinding.

Original languageEnglish
Pages (from-to)285-293
Number of pages9
JournalSains Malaysiana
Volume46
Issue number2
DOIs
Publication statusPublished - 1 Feb 2017

Fingerprint

Inert gases
Injection molding
Corrosion resistance
Sintering
Stainless steel
Laboratory furnaces
Vacuum furnaces
Powders
Mechanical properties
Carbon
Corrosion rate
Densification
Ductility
Furnaces
Tensile strength
Vacuum
Hydrogen
Hot Temperature

Keywords

  • Corrosion resistance
  • Debinding
  • Mechanical properties
  • Powder injection molding
  • Weight loss method

ASJC Scopus subject areas

  • General

Cite this

Effects of debinding and sintering atmosphere on properties and corrosion resistance of powder injection molded 316 L - Stainless steel. / Raza, Muhammad Rafi; Ahmad, Faiz; Muhamad, Norhamidi; Sulong, Abu Bakar; Omar, M. A.; Akhtar, Majid Niaz; Aslam, Muhammad; Sherazi, Irfan.

In: Sains Malaysiana, Vol. 46, No. 2, 01.02.2017, p. 285-293.

Research output: Contribution to journalArticle

Raza, Muhammad Rafi ; Ahmad, Faiz ; Muhamad, Norhamidi ; Sulong, Abu Bakar ; Omar, M. A. ; Akhtar, Majid Niaz ; Aslam, Muhammad ; Sherazi, Irfan. / Effects of debinding and sintering atmosphere on properties and corrosion resistance of powder injection molded 316 L - Stainless steel. In: Sains Malaysiana. 2017 ; Vol. 46, No. 2. pp. 285-293.
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AU - Sulong, Abu Bakar

AU - Omar, M. A.

AU - Akhtar, Majid Niaz

AU - Aslam, Muhammad

AU - Sherazi, Irfan

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AB - 316L stainless steel is a common biomedical material. Currently, biomedical parts are produced through powder injection molding (PIM). Carbon control is the most critical in PIM. Improper debinding can significantly change the properties of the final product. In this work, thermal debinding and sintering were performed in two different furnaces (i.e. laboratory and commercially available furnaces) to study the mechanical properties and corrosion resistance. Debounded samples were sintered in different atmospheres. The samples sintered in inert gas showed enhanced mechanical properties compared with wrought 316L stainless steel and higher corrosion rate than those sintered in the vacuum furnace. The densification and tensile strength of the hydrogen sintered samples increased up to 3% and 51%, respectively, compared with those of the vacuum-sintered samples. However, the samples sintered in inert gas also exhibited reduced ductility and corrosion resistance. This finding is attributed to the presence of residual carbon in debonded samples during debinding.

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KW - Debinding

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KW - Weight loss method

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