Paper Title:
Comparative Study of the Additional Hardening Effects of Three Structural Steels
  Abstract

For a safe and reliable design of components, it is needed to study the effects of multiaxial loading and particularly the non-proportional loadings on the fatigue damage. The objective of this paper is to evaluate and compare the additional hardening effects of proportional and non-proportional loading paths. Low-cycle fatigue behaviour of three structural steels: CK45 (ferritic-perlitic microstructure) normalized steel, 42CrMo4 (bainitic microstructure) quenched and tempered steel and stainless steel (austenitic microstructure) X10CrNiS 18 9 are studied under different proportional and non-proportional loading paths and different levels. A series of tests of biaxial low-cycle fatigue composed of tension/compression with static or cyclic torsion were carried out on a biaxial servo-hydraulic testing machine Instron 8088. The experiments showed that the three materials studied have very different additional hardening behaviour, under multiaxial cyclic loading paths. The local cyclic stress/strain states are influenced by the multiaxial loading paths due to interactions between the normal stress and shear stress during cyclic plastic deformation. The microstructure is an important key and has a great influence on the additional hardening. The additional hardening effect is dependent of the loading path and also the intensity of the loading.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
534-538
DOI
10.4028/www.scientific.net/MSF.514-516.534
Citation
L. G. Reis, B. Li, M. de Freitas, "Comparative Study of the Additional Hardening Effects of Three Structural Steels", Materials Science Forum, Vols. 514-516, pp. 534-538, 2006
Online since
May 2006
Export
Price
$32.00
Share

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

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

Authors: Martin Petrenec, Veronique Aubin, Jaroslav Polák, Suzanne Degallaix
Abstract:Austenitic-ferritic duplex stainless steel has been subjected to uniaxial and biaxial nonproportional cyclic loading with the same equivalent...
179
Authors: Belen Moreno, Pablo Lopez-Crespo, Antonio González-Herrera, Jose Zapatero
Abstract:Many mechanical components are subjected to multiaxial fatigue. These conditions are typically coming from external loads, the geometry of...
41
Authors: Zhi Ping Ding, Ming Li, Teng Fei Wang, Rong Hua Yang
Chapter 3: Solid Mechanics
Abstract:Based on micro structure of Ni-based single crystal superalloy, a γ/γ’ two-phase unit cell finite element model was established, and its...
503