Residual Stress Distribution of Steel Welded Joints with Weld Metal of Low Martensite Transformation Temperature

Shiga, Chiaki; Mraz, Lubos; Bernasovský, Peter; Hiraoka, Kazuo; Mikula, P.; Vrána, M.

doi:10.1007/bf03266604

Cited by 16 publications

(3 citation statements)

References 1 publication

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“…Several publications have reported the significant reduction in tensile welding residual stresses and improvement of fatigue strength by using LTT filler material as compared to the joint welded with conventional welding wires (Ohta et al, 2002;Kromm et al, 2011;Shiga et al, 2007).…”

Section: Low Transformation Temperature (Ltt) Weldingmentioning

confidence: 99%

Post-Treatment of Welding Joints of High Strength Steels II.:Improving Residual Stress Condition – Overview

Sas¹,

Lukács

2022

MDT

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High strength steel welding joints fatigue strength could be improved by changing the as weld condition with post-weld treatment. These post-weld treatments are classified to two categories which are the weld geometry and residual stress condition improvement methods. Post-weld treatment methods of high strength steel welding joints by improving weld geometry were overviewed in the first part of our article. The post-weld treatment methods for improving the welding joint residual stress condition are also applicable in high strength steels, but some consideration have to take in place when applying these techniques. The aim of this paper to review the welding joint residual stress condition improvement techniques considers application of these techniques in high strength steels.

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Section: Low Transformation Temperature (Ltt) Weldingmentioning

confidence: 99%

Post-Treatment of Welding Joints of High Strength Steels II.:Improving Residual Stress Condition – Overview

Sas¹,

Lukács

2022

MDT

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“…A new 800 MPa high strength steel whose chemical composition is the same as that of a mild steel is under development. [1][2][3] The basic concept of strengthening this steel is the ferrite grain refining to a level less than 1 mm that leads to a remarkable increase in strength according to the Hall-Petch rule. [4][5][6][7][8] It is reported 9 that ultra-fine grained steels (UFG steels) were produced by finish rolling below 873 K with heavy reduction and that their microstructures consisted of ferrite grains of about 1 mm size and uniformly dispersed fine spherical cementite between 0 .…”

Section: Introductionmentioning

confidence: 99%

“…Susceptibility to cold cracking is thus greatly improved in the UFG steel. 2,10 However, grains coarsen in HAZ and significant softening results when the UFG steel is welded with a high heat input. The grain coarsening is caused by recrystallisation or abnormal phase transformation from austenite.…”

Section: Introductionmentioning

confidence: 99%

Softening characteristics in ultra-narrow gap GMA welded joints of ultra-fine grained steel

Ito¹,

Hiraoka²,

Shiga³

2005

Science and Technology of Welding and Joining

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When a 800 MPa grade ultra-fine grained steel with ferrite grains less than 1 μm and dispersed fine cementite is welded, fine ferrite grains are coarsened resulting in remarkable softening in the heat affected zone (HAZ). The peak temperature at an arbitrary location in HAZ during welding was calculated by heat conduction analysis and the effect of welding thermal history on the microstructure of the UFG steel HAZ was examined by microscopic observation. Softening as a result of ferrite grain coarsening was observed in the region where the peak temperature reaches between 920 and 1300 K for the ultra-fine grained steel with an Ac 1 temperature of 980 K and Ac 3 of 1150 K. The formation of martensite–austenite constituents started as a second phase above the Ac 1 temperature and they curbed HAZ softening in the peak temperature range between 1000 and 1250 K.

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Compressive Residual Stress in Welded Joints with Low-Temperature-Transformation Weld Metal in High-Strength Steel

Shiga

Murakawa

Matuo

et al. 2014

In-Situ Studies With Photons, Neutrons and Electrons Scattering II

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Residual Stress Distribution of Steel Welded Joints with Weld Metal of Low Martensite Transformation Temperature

Cited by 16 publications

References 1 publication

Post-Treatment of Welding Joints of High Strength Steels II.:Improving Residual Stress Condition – Overview

Post-Treatment of Welding Joints of High Strength Steels II.:Improving Residual Stress Condition – Overview

Softening characteristics in ultra-narrow gap GMA welded joints of ultra-fine grained steel

Compressive Residual Stress in Welded Joints with Low-Temperature-Transformation Weld Metal in High-Strength Steel

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