Affiliation:
1. Wuhan University of Science and Technology
2. Xiangtan Iron and Steel Co. Ltd
3. Beijing University of Science and Technology
Abstract
Preparation of nanocrystalline 430L stainless steel powders by high-energy ball milling has been investigated. The samples were characterized by scanning electron microscope (SEM), X-ray Diffraction (XRD) and Matersizer. The SEM observation confirmed that the cold welding and fragmentation behaviors occurred during high-energy ball milling, which has important effect on the changes of the particle size. In the initial stage (0-10h), particle size increased and crystalline grain size decreased evidently. The mean particle size got to 330μm and the crystalline grain size got to 23nm for sample of 10h ball milling. In the later stage, the particle size decreased and the refinement of crystalline grain became difficult. The crystalline grain size of sample for 50h ball milling only got to 15nm.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference8 articles.
1. Kishimato,A., Ishida, H. and Nakamura, Y. Design and fabrication of a strength controllable ceramic composite. J. Ceram. Soc. Japan Vol. 106 (1998), p.537～538.
2. Lu K, Wei.W. D, Wang J T. The mechanism of crystalline Ni88P12. Scripta Metall Matter Vol. 24 (1990), p.2319～2321.
3. C. Suryanarayana, mechanical alloying and milling. Progress in Materials Science Vol. 46, 1 (2001), p.1～184.
4. T. Nagae et al. Hot compaction of nanocrystalline stainless steel powders by spark-plasma sintering. Metal Powder Report Vol. 58, 6 (2003), p.53～54.
5. X.H. Chen,J. Lu, L. Lu and K. Lu. Tensile properties of a nanocrystalline 316L austenitic stainless steel. Scripta Materialia Vol. 52, 10 (2005), p.1039～1044.