Ductility of Bulk Nanocrystalline and Ultrafine Grain Iron and Steel

Abstract:

Article Preview

This paper reviews the ductility of nanostructured and ultrafine iron obtained using a variety of methods. Mechanical milling of powder and subsequent hot consolidation, one of the most popular methods offer high mechanical strength but poor ductility. Improvements made in the consolidation processes and the introduction of final heat treatments, in addition to new approaches such as spark plasma sintering and high pressure torsion, have increased the total plastic strain of nanostructured iron. The development of bimodal structures enables the existence of strain hardening and more uniform deformation. The paper also includes a steel study, which finds that the hardness of milled powder and the role of carbon atoms inside ferrite grains make it more difficult to improve the ductility of nanostructured samples.

Info:

Periodical:

Materials Science Forum (Volumes 633-634)

Edited by:

Yonghao Zhao and Xiaozhou Liao

Pages:

197-203

DOI:

10.4028/www.scientific.net/MSF.633-634.197

Citation:

J. A. Benito et al., "Ductility of Bulk Nanocrystalline and Ultrafine Grain Iron and Steel", Materials Science Forum, Vols. 633-634, pp. 197-203, 2010

Online since:

November 2009

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.