Microstructure and Properties of a Fe-Cu Composite Processed by HPT Powder Consolidation
A method to produce nanocrystalline Fe-Cu composites by means of high-pressure torsion (HPT) deformation is presented. Mixtures of micrometer sized powders of Fe and Cu with different ratios of the two components were precompacted and subsequently deformed by HPT at room temperature to a certain amount of strain. Afterwards, new samples were cut out of these previously deformed samples and further HPT deformation was conducted. The evolution of the microstructure during the different steps of the HPT process and the resulting microstructure of the composites were investigated by scanning electron microscopy. In summary it could be shown that the final attainable grain sizes in the composite materials in the two step process are much smaller than in the simply HPT deformed composites. The reduction of the grain size is also reflected in an enhancement of the hardness.
Andrea Bachmaier Reinhard Pippan
Erich Schmid Institute of Materials Science -Austrian Academy of Sciences,Jahnstr.12,A-8700 Leoben,Austria
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
229-234
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）