Numerical study on the effect of welding and heating treatments on strength of high strength steel column

High strength steel box columns are usually fabricated from steel slab by applying welding. The welding process can introduce residual stresses and geometric imperfections into the columns and influence the column strength. In this study, a numerical investigation on the behavior of high strength steel thin-walled box columns under the compression force was carried out. The welding processes were firstly simulated with commercial package ABAQUS in this study to find out the residual stress distributions in high strength steel box column. After that, the column behaviors under the compression were modelled with predefined field from the previous step. The effect of the welding process (including flux-core arc welding and submerged arc welding), heating treatment (including preheating and post-weld heat treatment) and geometrical imperfection on the residual stress field and box column strength was investigated and discussed.

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The Effect of Strength Mis-Match and Residual Stress in ECA of Girth Welds With Internal Circumferential Cracks

Volume 6: Materials and Fabrication, Parts A and B ◽

10.1115/pvp2009-77683 ◽

2009 ◽

Cited By ~ 1

Author(s):

Ali Mirzaee Sisan ◽

Afshin Motarjemi

Keyword(s):

Residual Stress ◽

Stress Field ◽

Driving Forces ◽

Numerical Study ◽

Welding Process ◽

Detailed Comparison ◽

Weld Strength ◽

Residual Stress Field ◽

Girth Welds ◽

Welded Pipe

A numerical study was carried out to quantify the effect of a residual stress field on subsequent fracture behaviour of a girth welded pipe with an internal circumferential long crack when subjected to high applied strain loading. In order to introduce an initial residual stress field similar to a welding process in a pipe, a quenching process was numerically simulated and associated residual stress profiles were modified and mapped into the finite element (FE) models. A detailed comparison between the crack driving force for various cases with and without residual stress and weld strength mismatch was carried out for cases under a high plastic deformation regime. The BS7910 procedure was also used to predict crack driving forces using its current assumption of interaction of residual stress with primary loads. The results obtained from the FE analyses were compared with the BS7910 predictions.

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Experimental and numerical study on the behavior of axially compressed high strength steel box-columns

Engineering Structures ◽

10.1016/j.engstruct.2013.10.013 ◽

2014 ◽

Vol 58 ◽

pp. 79-91 ◽

Cited By ~ 71

Author(s):

Yan-Bo Wang ◽

Guo-Qiang Li ◽

Su-Wen Chen ◽

Fei-Fei Sun

Keyword(s):

High Strength Steel ◽

Numerical Study ◽

High Strength ◽

Box Columns

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Investigation of Microstructure and Hardness Properties of Hardfacing Surface on SCM 440 Alloy Steel by Using Metal Active Gas and Flux Cored Arc Welding Processes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.728.31 ◽

2017 ◽

Vol 728 ◽

pp. 31-35 ◽

Cited By ~ 1

Author(s):

Siva Sitthipong ◽

Prawit Towatana ◽

Amnuay Sitticharoenchai

Keyword(s):

Alloy Steel ◽

Arc Welding ◽

Welding Process ◽

High Strength ◽

Side Plate ◽

Weld Metals ◽

Flux Cored Arc Welding ◽

The Difference ◽

Arc Welding Process ◽

Welding Processes

This research aimed to investigate the microstructure and hardness properties of hardfacing surface on SCM440 alloy steel by using metal active gas and flux cored arc welding processes. Due to the difficulty of welding the high strength steel, the changes in base metals’ microstructures were found after welding. Preheating the specimens at 350°C and post weld heat treatment the specimens at 550°C were performed for 1 hour, to reduce the residual stresses and avoid the undesired formation of microstructures. The weld metals’ microstructures that were found from both welding processes are acicular ferrite, polygonal ferrite and side plate ferrite. The hardness value of weld metal resulted from flux cored arc welding process is higher than that of the metal active gas welding process. Each welding process produced different quantities of weld metals’ microstructures, causing the difference in hardness values. The data will be used for investigating and improving parameters of shaft repairing, in order to use it more effectively.

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Microstructure and residual stress analysis of Strenx 700 MC welded joint

Production Engineering Archives ◽

10.30657/pea.2020.26.09 ◽

2020 ◽

Vol 26 (2) ◽

pp. 41-44

Author(s):

Libor Trško ◽

Ján Lago ◽

Michal Jambor ◽

František Nový ◽

Otakar Bokůvka ◽

...

Keyword(s):

Residual Stress ◽

Heat Affected Zone ◽

Microstructural Analysis ◽

Fatigue Crack Initiation ◽

Welding Process ◽

High Strength ◽

Carbon Steels ◽

Fatigue Properties ◽

Residual Stress Field ◽

Welded Structure

AbstractHigh strength low alloy (HSLA) steels are a new generation of plain carbon steels with significantly improved mechanical properties while maintaining good weldability with common commercial techniques. Residual stress and microstructural analysis of welded HSLA Strenx 700 MC was carried out in this research. Results have shown that the welding process causes significant grain coarsening in the heat affected zone. The microstructural changes are also accompanied with creation of tensile residual stress field in the weld metal and heat affected zone, reaching up-to depth of 4 mm. Tensile residual stresses are well known for acceleration of fatigue crack initiation and together with coarse grains can lead to significant decrease of the fatigue properties of the welded structure.

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Residual stress of high strength steel box T-joints Part 2: Numerical study

Journal of Constructional Steel Research ◽

10.1016/j.jcsr.2014.02.010 ◽

2014 ◽

Vol 98 ◽

pp. 73-87 ◽

Cited By ~ 13

Author(s):

C.K. Lee ◽

S.P. Chiew ◽

Jin Jiang

Keyword(s):

Residual Stress ◽

High Strength Steel ◽

Numerical Study ◽

High Strength ◽

T Joints

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Residual Stress Analysis and Weld Bead Shape Study in Laser Welding of High Strength Steel

Volume 1: Processing ◽

10.1115/msec2013-1102 ◽

2013 ◽

Cited By ~ 1

Author(s):

Wei Liu ◽

Fanrong Kong ◽

Radovan Kovacevic

Keyword(s):

Heat Treatment ◽

Residual Stress ◽

Laser Welding ◽

Welding Speed ◽

High Strength Steel ◽

Laser Power ◽

Measurement Data ◽

Welding Process ◽

High Strength ◽

Weld Bead

The X-ray diffraction (XRD) technique is employed to measure residual stress induced by the laser welding of 6.7 mm thick ASTM A514 high strength steel plates. The distribution of residual stress in the weld bead is investigated. The results indicate that the fusion zone (FZ) has the maximum tensile stress, the transition from tensile to compressive stress tends to appear in the heat affected zone (HAZ), and the initial stress far from the weld center are not influenced by the welding process. Based on the measurement data, the influence of the laser power and the welding speed on residual stress is obtained. The magnitude of residual stress near the weld bead increases with an increase in laser power or a decrease in welding speed. The welds with incomplete penetration have a considerably lower magnitude of residual stress in FZ than ones with full penetration. Post-weld heat treatment is utilized to relieve residual stress in the weld bead. Although residual stress is not completely relieved after the heat treatment, a dramatically reduced magnitude and much more uniform distribution are achieved. In addition, the effects of the laser power, the welding speed, the laser spot diameter, and the gap between two plates on the weld shape are also studied.

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