Delamination wear of metal injection moulded 316L stainless steel |
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Authors: | C Kanchanomai B Saengwichian A Manonukul |
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Affiliation: | aDepartment of Mechanical Engineering, Faculty of Engineering, Thammasat University, Pathumthani 12120, Thailand;bMaterial Property of Analysis and Development Centre, Thailand Institute of Scientific and Technological Research, Pathumthani 12120, Thailand;cNational Metal and Materials Technology Center (MTEC), Thailand Science Park, 114 Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand |
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Abstract: | The wear behavior of metal injection moulded (MIM) stainless steels was studied using a pin-on-disc apparatus under dry sliding conditions. Pin specimens were MIM 316L stainless steel, while disc specimens were wrought 316L stainless steel. At low sliding speeds (0.2–0.6 m/s), the wear rates gradually decreased with increasing sliding speed, but then increased at high sliding speeds (0.6–2 m/s). The adhesive-induced delamination wear dominated at low sliding speeds, while abrasive-induced delamination wear dominated at high sliding speeds. At low sliding speeds, the surface densification occurred on the worn surface of pin specimens, hence no difference was found between the wear resistances of MIM pins containing 2% and 6% porosity. In contrast, the abrasive-induced delamination wear at high sliding speeds was enhanced by porosity; therefore the wear rates of MIM pins containing 6% porosity were higher than those of MIM pins containing 2% porosity. |
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Keywords: | Metal injection moulding (MIM) Stainless steels Sliding wear Martensitic phase transformation |
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