Residual Stresses in Flash Butt Welded Rail

Cal, Zhipeng; Nawafune, Masashi; Ma, Ninshu et al.

Transactions of JWRI, 2011, 40(1), 79-87

Number of Access:441（2025-06-06 17:36 Counts）

Identifier to cite or link to this item: https://doi.org/10.18910/4606

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Title
Residual Stresses in Flash Butt Welded Rail
Creator
CreatorName
Cal, Zhipeng
CreatorName
Nawafune, Masashi
NRID
1000010263328 1000010263328
ORCID
0000-0002-8088-4154 0000-0002-8088-4154
researchmap permalink
ma.ninshu ma.ninshu
Scopus Author ID
36343934100 36343934100
CreatorName
Ma, Ninshu
CreatorName
Qu, Yuebo
CreatorName
Cao, Bin
NRID
1000060166270 1000060166270
CreatorName
Murakawa, Hidekazu
Subject
Flash butt welding
U71Mn Rail
Residual Stress
Phase Transformation
Measurement
FEM Simulation
Abstract
The residual stresses on the surface of a rail joined by flash-butt welding are measured using a hole-drilling method and the thermal elastic-plastic deformation process considering the phase transformation are simulated using FEM code JWRIAN. The residual stresses measured by experiments and computed by FEM have an acceptable agreement in accuracy. The simulation results show that the phase transformation in the cooling stage has a significant effect on the residual stress distribution and its values. The tensile or compressive state for residual stresses near the welding section strongly depends on the phase transformation which occurred during the cooling process. The biaxial tensile stresses are produced at the web near the fusion line of the flash butt welded rail. The biaxial tensile stresses increase the risk of cracks. Although the Martensite phase transformation during the cooling process at top and bottom near the fusion line produces compressive stress, it increases the brittleness at the same time. Therefore, the proper heat treatment after welding is still necessary in order to improve the toughness.
Publisher
大阪大学接合科学研究所
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
Joining and Welding Research Institute, Osaka University
Source Title
Transactions of JWRI
Volume (Issue)
40(1)
Page
79-87
Date of Issued
2011-06
Language
English
Handle URL
https://hdl.handle.net/11094/4606
DOI
https://doi.org/10.18910/4606
PISSN
03874508
NCID
AA00867058
Access Rights
open access
oaire:version
Version of Record
Category
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.40 No.1 (2011-06)