The development of creep damage constitutive equations for low Cr-Mo alloy steel and its weldment at low stress

Tools

Xu, Qihua, Xu, Qiang and Lu, Zhongyu (2013) The development of creep damage constitutive equations for low Cr-Mo alloy steel and its weldment at low stress. In: 6th International ‘HIDA’ Conference: Life/Defect Assessment & Failures in High Temperature Plant, 2nd-4th December 2013, Nagasaki, Japan.

There is a more recent version of this item available.

Preview

PDF - Accepted Version
Download (702kB) | Preview

Abstract

The ultimate objective of this research project is to develop creep damage constitutive equations for low Cr-Mo alloy and its weldment under low stress (0.2-0.4 yield stress,σ_Y). This paper summarizes a critical analysis on the cavity nucleation and growth and the deformation mechanisms and creep damage evolution characteristics at low stress with temperature ranging from 450 °C to 650 °C, in order to firmly establish the physical base for the theoretical constitutive modeling work. Moreover, it covers the influence of the stress level on the development of cavity nucleation and growth, leading to the final rupture, and proposes and discusses a new idea for failure criterion to be used in the constitutive equations under uni-axial stress state. This paper contributes to knowledge and the development of methodology.

Item Type:

Conference or Workshop Item (Paper)

Contributors:

Contribution	Name	Email	ORCID
Author	Qihua, Xu	u1372662@hud.ac.uk	UNSPECIFIED
Author	Qiang, Xu	UNSPECIFIED	UNSPECIFIED
Author	Zhongyu, Lu	UNSPECIFIED	UNSPECIFIED
Author	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED