Crack growth resistance of MAG butt-welded joints of S355JR construction steel

被引：24
作者：
Benedetti, M. [1 ]
Fontanari, V. [1 ]
Santus, C. [2 ]
机构：
[1] Univ Trento, Dept Ind Engn, I-38123 Trento, Italy
[2] Univ Pisa, Dept Mech Nucl & Prod Engn, I-56126 Pisa, Italy
来源：
ENGINEERING FRACTURE MECHANICS | 2013年 / 108卷
关键词：
Welded joints; MAG; S355JR construction steel; Fatigue crack growth resistance; Elastic-plastic fracture toughness; FATIGUE-STRENGTH; MULTIAXIAL FATIGUE; STRESS INTENSITY; NOTCHES;
D O I：
10.1016/j.engfracmech.2013.01.019
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Fatigue crack growth resistance and elastic-plastic fracture toughness were measured on MAG (Metal Active Gas) butt-welded joints made of S355JR construction steel. For this purpose, C(T) specimens were extracted from virgin and welded 15 mm thick rolled plates. Tests were conducted on the base material (BM), the heat affected zone (HAZ) and weld metal (WM). The analyses showed that compressive residual stresses due to welding increased the fatigue crack growth resistance of WM and HAZ owing to crack closure effects. The WM displayed the lowest elastic-plastic fracture toughness with respect to HAZ and BM. The highest value was exhibited by the HAZ because stable tearing crack extension is forced along an unfavourable crack path. Therefore, particular care must be taken in evaluating the crack path in welded joints in order to correctly estimate their resistance to crack advance. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：305 / 315
页数：11
相关论文
共 32 条
[1]  
[Anonymous], E64708 ASTM INT
[2]  
[Anonymous], 2001, Assessment of the Integrity of Structures Containing Defects, Revision 4
[3]  
ASTM international, 2009, ASTM E1820-09
[4]   From a local stress approach to fracture mechanics: a comprehensive evaluation of the fatigue strength of welded joints [J].
Atzori, B ;
Lazzarin, P ;
Tovo, R .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1999, 22 (05) :369-381
[5]   Influence of sharp microstructural gradients on the fatigue crack growth resistance of α plus β and near-α titanium alloys [J].
Benedetti, M ;
Heidemann, J ;
Peters, JO ;
Lütjering, GL .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2005, 28 (10) :909-922
[6]   Behaviour of fatigue cracks emanating from circular notches in Ti-6Al-4V under bending [J].
Benedetti, M ;
Bertini, L ;
Fontanari, V .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2004, 27 (02) :111-125
[7]   Structural health monitoring of wind towers: remote damage detection using strain sensors [J].
Benedetti, M. ;
Fontanari, V. ;
Zonta, D. .
SMART MATERIALS AND STRUCTURES, 2011, 20 (05)
[8]   Fatigue cracks emanating from sharp notches in high-strength aluminium alloys: The effect of loading direction, kinking, notch geometry and microstructure [J].
Benedetti, M. ;
Beghini, M. ;
Fontanari, V. ;
Monelli, B.D. .
INTERNATIONAL JOURNAL OF FATIGUE, 2009, 31 (11-12) :1996-2005
[9]   Reverse bending fatigue of shot peened 7075-T651 aluminium alloy: The role of residual stress relaxation [J].
Benedetti, M. ;
Fontanari, V. ;
Scardi, P. ;
Ricardo, C. L. A. ;
Bandini, M. .
INTERNATIONAL JOURNAL OF FATIGUE, 2009, 31 (8-9) :1225-1236
[10]   Fatigue resistance of MAG welded steel elements [J].
Chiarelli, M ;
Lanciotti, A ;
Sacchi, M .
INTERNATIONAL JOURNAL OF FATIGUE, 1999, 21 (10) :1099-1110
1234