Short fatigue cracks nucleation and growth in lean duplex stainless steel LDX 2101

被引：26

作者：

Strubbia, R. ^{[1
]}

Herenu, S. ^{[1
]}

Alvarez-Armas, I. ^{[1
]}

Krupp, U. ^{[2
]}

机构：

[1] Univ Nacl Rosario, CONICET, Inst Fis Rosario, RA-2000 Rosario, Santa Fe, Argentina

[2] Univ Appl Sci Osnabruck, Fac Engn & Comp Sci, Osnabruck, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 615卷

关键词：

Duplex stainless steel; Fatigue; Crack nucleation and growth; Microstructure; EBSD; HIGH-CYCLE FATIGUE; SINGLE-CRYSTALS; SLIP SYSTEMS; BEHAVIOR; DEFORMATION; MECHANISMS; FEATURES;

D O I：

10.1016/j.msea.2014.07.076

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work is focused on the fatigue damage of lean duplex stainless steels (LDSSs) LDX 2101. Special interest is placed on analyzing short fatigue crack behavior. In this sense, short crack initiation and growth during low cycle fatigue (LCF) and short crack nucleation during high cycle fatigue (HCF) of this LOSS have been studied. The active slip systems and their associated Schmid factors (SF) are determined using electron backscattered diffraction (EBSD). Additionally, the dislocation structure developed during cycling is observed by transmission electron microscopy (TEM). Regardless of the fatigue regime, LCF and HCF, short cracks nucleate along intrusion/extrusions in ferritic grains. Moreover, during the LCF phase boundaries decelerate short crack propagation. These results are rationalized by the hardness of the constitutive phases and the dependence of screw dislocation mobility in the ferrite phase on strain rate and stress amplitude. (C) 2014 Elsevier B.V. All rights

引用

页码：169 / 174

页数：6

共 24 条

[1] The influence of nitrogen and orientation on the rolling deformation mechanisms of austenitic single crystals [J].

Akdut, N ;

Keichel, J ;

Foct, J .

STEEL RESEARCH, 1997, 68 (11) :495-500

[2]

Alfonsson E., 2010, 8 DUPL STAINL STEELS

[3] Growth of short cracks during low and high cycle fatigue in a duplex stainless steel [J].

Alvarez-Armas, I. ;

Krupp, U. ;

Balbi, M. ;

Herenu, S. ;

Marinelli, M. C. ;

Knobbe, H. .

INTERNATIONAL JOURNAL OF FATIGUE, 2012, 41 :95-100

[4] Microcrack growth and fatigue behavior of a duplex stainless steel [J].

Balbi, M. ;

Avalos, M. ;

El Bartali, A. ;

Alvarez-Armas, I. .

INTERNATIONAL JOURNAL OF FATIGUE, 2009, 31 (11-12) :2006-2013

[5]

Da-Wei J., 2012, J IRON STEEL RES INT, V19, P50

[6] Identification and analysis of slip systems activated during low-cycle fatigue in a duplex stainless steel [J].

El Bartali, A. ;

Aubin, V. ;

Sabatier, L. ;

Villechaise, P. ;

Degallaix-Moreuil, S. .

SCRIPTA MATERIALIA, 2008, 59 (12) :1231-1234

[7] CLEAVAGE-LIKE FRACTURE OF AUSTENITE IN DUPLEX STAINLESS-STEEL [J].

FOCT, J ;

AKDUT, N .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 29 (02) :153-158

[8] EBSD studies on the influence of texture on the surface damage mechanisms developed in cyclically loaded aged duplex stainless steels [J].

Gironés, A ;

Villechaise, P ;

Mateo, A ;

Anglada, M ;

Méndez, J .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 387 :516-521

[9]

Grosskreutz J.C., 1975, CONSTITUTIVE EQUATIO, P251

[10] CYCLIC RESPONSE AND DISLOCATION-STRUCTURES OF AISI 316L STAINLESS-STEEL .1. SINGLE-CRYSTALS FATIGUED AT INTERMEDIATE STRAIN AMPLITUDE [J].

LI, YF ;

LAIRD, C .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 186 (1-2) :65-86

← 1 2 3 →