Developments in martensitic and bainitic steels: role of the shape deformation

被引：186

作者：

Bhadeshia, HKDH ^{[1
]}

机构：

[1] Univ Cambridge, Cambridge CB2 3QZ, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 378卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

bainite; martensite; shape deformation; displacive mechanism; residual stress; nanocrystalline;

D O I：

10.1016/j.msea.2003.10.328

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Steels can be designed to exploit the coordinated motion of atoms during the bainite and martensite reactions. In this way, it has been possible to make exceptionally strong and tough alloys in bulk form, and at an affordable price. Crystal sizes can be reduced to between 20 and 180 nm, by annealing heterogeneously deformed martensite, or by forming bainite under conditions where there is no atomic mobility. Engineering failures are dominated by fatigue, the effects of which are exacerbated by welding and the associated residual stresses. Alloys can now be designed such that the deformation caused by transformation eliminates residual stresses, with extraordinary improvements in the fatigue life of constrained assemblies of metal. These important achievements are described here, within a framework which relates the atomic mechanism to the engineering scale. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：34 / 39

页数：6

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