Characterization of a 14Cr ODS steel by means of small punch and uniaxial testing with regard to creep and fatigue at elevated temperatures

被引：25

作者：

Bruchhausen, M. ^{[1
]}

Turba, K. ^{[1
,2
]}

de Haan, F. ^{[1
]}

Hahner, P. ^{[1
]}

Austin, T. ^{[1
]}

de Carlan, Y. ^{[3
]}

机构：

[1] Inst Energy & Transport, Joint Res Ctr, European Commiss, NL-1755 ZG Petten, Netherlands

[2] Lund Univ, Div Mat Engn, SE-22100 Lund, Sweden

[3] CEA, DEN, Serv Rech Met Appl, F-91191 Gif Sur Yvette, France

来源：

JOURNAL OF NUCLEAR MATERIALS | 2014年 / 444卷 / 1-3期

关键词：

MECHANICAL-PROPERTIES; FERRITIC STEEL; MATERIALS CHALLENGES; STRUCTURAL-MATERIALS; MICROSTRUCTURE; ALLOYS; ANISOTROPY; BEHAVIOR; TENSILE; SYSTEMS;

D O I：

10.1016/j.jnucmat.2013.09.059

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A 14Cr ODS steel was characterized at elevated temperatures with regard to its behavior in small punch and uniaxial creep tests and in low cycle fatigue tests. A comparison of small punch and uniaxial creep tests at 650 degrees C revealed a strong anisotropy of the material when strained parallel and perpendicular to the extrusion direction with rupture times being several orders of magnitude lower for the perpendicular direction. The stress-rupture and Larson-Miller plots show a very large scatter of the creep data. This scatter is strongly reduced when rupture time is plotted against minimum deflection rate or minimum creep rate (Monkman-Grant plot). Fatigue tests have been carried out at 650 degrees C and 750 degrees C. The alloy is cyclically very stable with practically no hardening/softening. Results from the tests at both temperatures can be described by a common power law. An increase in the test temperature has little influence on the fatigue ductility exponent. For a given total strain level, the fatigue life of the alloy is reduced with increasing temperature. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：283 / 291

页数：9

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