Microstructural characterization of medical-grade stainless steel powders prepared by mechanical alloying and subsequent annealing

Date
2013
Advisor
Instructor
Source Title
Advanced Powder Technology
Print ISSN
0921-8831
Electronic ISSN
Publisher
Elsevier
Volume
24
Issue
3
Pages
605 - 608
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

The harmful effect of nickel ions released from conventional stainless steel implants has provided a high level of motivation for the further development of nickel-free stainless steels. In this paper, the microstructure of medical-grade nickel-free stainless steel powders, with the chemical composition of ASTM F2581, is studied during mechanical alloying and subsequent annealing. Rietveld X-ray diffraction and transmission electron microscopy evaluations reflect nanocrystallization, austenitization and amorphization of the powders due to mechanical activation. It is also realized that annealing of the as-milled powder can develop a single austenitic structure with nanometric crystallite sizes, implying a considerable inherent resistance to grain growth. This study demonstrates the merit of mechanical alloying and subsequent annealing in the development of nanostructured medical-grade stainless steels.

Course
Other identifiers
Book Title
Keywords
Annealing, Mechanical alloy, Medical-grade stainless steel, Microstructure, Nanostructured materials, Chemical compositions, Mechanical activation, Mechanical alloys, Micro-structural characterization, Nickel-free stainless steel, Rietveld x-ray diffractions, Stainless steel implants, Stainless steel powders, Annealing, Grain growth, Mechanical alloying, Microstructure, Nanostructured materials, Nickel, Transmission electron microscopy, X ray diffraction, X ray powder diffraction, Stainless steel
Citation
Published Version (Please cite this version)