Microstructural characterization of medical-grade stainless steel powders prepared by mechanical alloying and subsequent annealing |
| |
| Authors: | E Salahinejad MJ Hadianfard M Ghaffari R Amini Sh Bagheri Mashhadi AK Okyay |
| |
| Affiliation: | 1. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Zand Blvd., 7134851154 Shiraz, Iran;2. Department of Electrical and Electronics Engineering, UNAM – National Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey;3. Department of Materials Science and Engineering, Shiraz University of Technology, Modarres Blvd., 3619995161 Shiraz, Iran |
| |
| 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. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
