Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31440
Title: Enhanced mechanical behavior of a nanocrystallised stainless steel and its thermal stability
Authors: Roland, T
Retraint, D
Lu, K
Lu, J
Keywords: Grain refinement
Mechanical properties
SMAT
Stainless steel
Thermal stability
Issue Date: 2007
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2007, v. 445-446, p. 281-288 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: This paper discusses the mechanical properties of a nanocrystallised stainless steel obtained using surface mechanical attrition treatment (SMAT) and the underlying grain refinement mechanism using transmission electron microscopy (TEM). It was shown that grain refinement down to the nanometer range has the potential to significantly improve the mechanical properties of a 316L stainless steel which becomes comparable in strength to titanium alloys. Hence, promising structural applications could be considered for such a material. At the same time, the thermal stability of this nanocrystallised material was studied in the temperature range from 100 to 800 °C. The results show that the nanometer scaled microstructure is retained up to 600 °C and that a controlled annealing treatment could even lead to enhancement of both strength and ductility of this material. All these results are explained in terms of microstructural investigations, X-ray diffraction measurements, tensile and bending tests as well as microhardness measurements.
URI: http://hdl.handle.net/10397/31440
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/j.msea.2006.09.041
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