ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Based on strain-induced grain refinement, a novel surface mechanical attrition treatment(SMAT) technique has been developed to synthesize a nanostructured surface layer on metallicmaterials in order to upgrade their overall properties and performance without changing theirchemical compositions. In recent several years, the microstructures and properties of surface layerwere systematically investigated in various SMAT metals and alloys, including b.c.c., f.c.c. and h.c.p.crystal structures. Different grain refinement approaches and nanocrystalline formation mechanismswere identified in these deformed materials, involving dislocation activities, mechanical twinning andinteraction of dislocations with mechanical twins. The properties of the surface layer were measuredby means of hardness, tensile, fatigue and wear tests. The enhanced properties of the surface layer aremainly attributed to the strain-induced grain refinement. In this work, we reviewed themicrostructures and properties of surface layer in the SMAT materials
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.579.91.pdf
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