Article
Materials Science, Multidisciplinary
Priya Singh, Navneet Arora
Summary: This study investigates the fabrication of dissimilar metal welds for advanced ultra-supercritical boilers, using a buttering technique. It is found that the mechanical properties and creep rupture life can be significantly improved by buttering, especially when thin layers of buttering material are applied at the ferritic end.
Article
Metallurgy & Metallurgical Engineering
X. Guo, P. He, K. Xu, X. Ch Lv, J. B. Zhang, Y. Gu
Summary: The microstructure of the fusion zone of steel/nickel-alloy dissimilar metal welds for nozzle buttering was investigated, revealing beach, peninsula, and island structures. The distribution of these structures near the fusion boundary was uneven.
WELDING IN THE WORLD
(2022)
Article
Materials Science, Multidisciplinary
N. Hytonena, Y. Ge, Z. Que, S. Lindqvist, P. Nevasmaa, I. Virkkunen, P. Efsing
Summary: This study investigated a SA508/Alloy 52 dissimilar metal weld mock-up with double-sided Alloy 52 butterings, which accurately represents the repair solution for Ringhals pressurizer surge nozzle DMW. The microstructure, crystal structure, elemental diffusion, carbide formation, and macro-, micro- and nano-hardness of the SA508/nickel-base Alloy 52 buttering fusion boundary were analyzed. Three types of fusion boundaries were identified, including narrow, tempered martensitic transition, and wide partially mixed zones, which were influenced by local heat flow and elemental diffusion, resulting in hardness mismatch and brittle fracture behavior at the DMW interface.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
C. V. da Silva Lima, M. Verdier, F. Robaut, J. Ghanbaja, G. Badinier, T. Marlaud, C. Tassin, H. P. Van Landeghem
Summary: The study investigates the design of dissimilar metal weld for application in a sodium-cooled nuclear reactor's steam generator with a long lifespan. The focus is on analyzing the microstructural and micromechanical evolution between a low-alloy steel and a nickel-based filler metal through post-weld heat treatment. Various characterization techniques are used to assess the composition, hardness, and microstructures across the fusion boundary, providing insights into the main changes occurring during post-weld heat treatment.
WELDING IN THE WORLD
(2021)
Article
Materials Science, Multidisciplinary
Xiaogang Li, Zhipeng Cai, Xin Chen, Shuqing Dong, Wenhe Cai, Xiaoming Shi, Chaoyu Han, Yu Zhang, Kejian Li, Jiluan Pan
Summary: The interfacial microstructures of ex-service dissimilar metal weld between austenitic stainless steel and low alloy ferritic steel were studied, revealing an ultra-fine grain band at the nickel-based weld metal/Low alloy steel interface. These ultra-fine grains were ferrite transformed from pre-existing martensite layer, triggering interfacial oxide notch and increasing the risk of interfacial cracking. This study provides new insights into the premature failure of such type of dissimilar metal welds.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Bin Zhang, Weidong Mu, Hailong Liu, Geng Xie, Yan Cai
Summary: This article investigates the effect of multiple thermal cycles on the microstructure evolution of weld root in S690QL high-strength steel. The results indicate the presence of a local brittle zone (LBZ) in the root weld pass. The microhardness of the root zone is intermediate between the submerged arc welding (SAW) zone and shielded metal arc welding (SMAW) zone, while the impact energy is similar to that of the LBZ. The dilution of base metal elements and multiple thermal cycles lead to grain coarsening, a decrease in high-angle grain boundaries, and growth of martensite-austenite (M-A) constituents in the root zone, resulting in reduced impact toughness.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Dandan Zhang, Xinge Zhang, Wenquan Wang, Jianyang Zheng, Juntong Chu, Lei Cui, Yingtao Tian
Summary: Magnesium alloy and Al-Si-coated steel were joined using the CMT welding process. The presence of the Al-Si coating improved the wetting and spreading behavior of the molten magnesium alloy on the steel substrate. The formation of a Fe-Al intermetallic reaction layer enhanced the metallurgical bonding between the magnesium alloy and steel. The effects of the Al-Si coating and welding heat input on interface layer characteristics were assessed, and the tensile shear strength of the Mg/steel welded joints reached 359.3 N/mm with a heat input of 178.1 J/mm. The fracture modes and failure mechanism were analyzed and discussed.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yong Wu, Gang Liu, Zhi-Qiang Liu, Ze-Jun Tang, Bin Wang
Summary: Dissimilar joining of Ti2AlNb and Ti60 rolled sheet was achieved through laser beam welding. The microstructures and mechanical properties of the joints were investigated, revealing the presence of various phases in the fusion zone and heat-affected zones. The tensile strength and elongation of the as-welded sheet were improved by heat treatment, particularly at 970 degrees C.
Article
Materials Science, Multidisciplinary
K. Karthick, S. Malarvizhi, V Balasubramanian
Summary: The investigation revealed the development of heterogeneous microstructure and non-uniform microhardness across the dissimilar weld joint between modified 9Cr-1Mo ferritic steel and 316LN stainless steel. This was attributed to variations in carbon content and melting temperature differences in the heat-affected zones.
MATERIALS SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Reza Ansari, Mojtaba Movahedi, Majid Pouranvari
Summary: This paper investigates the effect of friction stir butt welding on the microstructure and mechanical performance of dissimilar welds of duplex stainless steel and low carbon steel. The microstructure of the stirred zone is controlled by dynamic recrystallization, material intermixing, and atomic interdiffusion. The stirred zone can be divided into three distinct metallurgical regions, including a dual-phase zone, a ferrite phase zone, and a martensite zone. The shear strength of the stirred zone is higher than that of the base metals.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hongmin Ju, Shiwei Zhuo, Jing Liu, Zirui Chen, Huijie Cui, Yanli Wang, Shilei Li
Summary: The effect of thermal aging on microstructural evolution and mechanical behavior was studied using advanced instrumental analysis. The microstructure in the coarse-grained heat-affected zone transformed from martensite to martensite/bainite mixture. The micro-hardness in this zone showed a positive correlation with thermal aging time due to changes in microstructure and increased number of M23C6 precipitates. The tensile strength and elongation of dissimilar metal welds also increased with thermal aging time. However, fracture occurred on the Alloy 152 side and exhibited a ductile fracture mode.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Manufacturing
Qibing Wang, Ruishan Xin, Zhichun Wang, Zhewen Han, Xiangdong Jiao, Ju Kang
Summary: This study investigates the high-temperature mechanical properties and deformation behavior of a T92/HR3C dissimilar metal weld joint. The results show a strength mismatch between the weld metal and the heat-affected zone, with the inter-critical T92-HAZ being the weakest area. Transmission electron microscopy reveals that dynamic recrystallization and re-precipitation are responsible for the observed serrated flow behavior and increased tensile strength in the weld metal.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Weijiang Yang, Yining Zhou, Yunzan Ma, Kejia Liu, Lianbo Wang, Kun Chen
Summary: This paper presents a study on obtaining a single-phase ferrite layer with low carbon content on the surface of 0.45% carbon steel by controlling the cooling rate during heat treatment. The mechanical properties of the layer show a graded change in the cross-section. The experimental findings provide a theoretical explanation and direct experimental proof for the production mechanism of the surface ferrite layer.
Article
Materials Science, Multidisciplinary
Yongwu Wu, Xiaobo Yuan, Ming Zhong, Junjie Ma, Cong Wang
Summary: Fused CaF2-TiO2 fluxes were used to investigate the role of TiO2 in columnar austenite grains in the weld metal of EH36 shipbuilding steel under high heat input submerged arc welding. The weld metal geometries were significantly changed as the TiO2 content varied from 0 to 40 wt pct. Moreover, the volume fraction of columnar grains reached a maximum value at 30 wt pct TiO2, which was inversely related to the width variation.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Engineering, Manufacturing
Ranjeet Kumar, Anand Varma, Y. Ravi Kumar, Suresh Neelakantan, Jayant Jain
Summary: The study examines the influence of heat treatment modification during post-weld heat treatment on the microstructure and mechanical properties of dissimilar welds of T91 and Super304H. The results show that post-weld normalizing and tempering treatment can achieve a uniform microstructure and significantly improve the mechanical properties.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Mechanical
Dinesh W. Rathod, Sunil Pandey, P. K. Singh, Rajesh Prasad
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
(2016)
Article
Nanoscience & Nanotechnology
Dinesh W. Rathod, P. K. Singh, Sunil Pandey, S. Aravindan
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Metallurgy & Metallurgical Engineering
Dinesh W. Rathod, Sunil Pandey, Sivanandam Aravindan, Pavan Kumar Singh
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2017)
Article
Engineering, Multidisciplinary
J. C. Feng, D. W. Rathod, M. J. Roy, J. A. Francis, W. Guo, N. M. Irvine, A. N. Vasileiou, Y. L. Sun, M. C. Smith, L. Li
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2017)
Article
Materials Science, Multidisciplinary
Dinesh W. Rathod, Sunil Pandey, P. K. Singh, Suranjit Kumar
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Nanoscience & Nanotechnology
Dinesh W. Rathod, R. K. Raj Singh, Sunil Pandey, S. Aravindan, P. K. Singh
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Nanoscience & Nanotechnology
Dinesh W. Rathod, John A. Francis, Matthew J. Roy, Gideon Obasi, Neil M. Irvine
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Engineering, Mechanical
Ratnesh Kumar Raj Singh, Dinesh W. Rathod, Sunil Pandey
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2018)
Article
Engineering, Multidisciplinary
D. W. Rathod, J. A. Francis, A. N. Vasileiou, M. J. Roy, P. D. English, J. Balakrishnan, M. C. Smith, N. M. Irvine
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2019)
Article
Engineering, Multidisciplinary
A. N. Vasileiou, M. C. Smith, J. A. Francis, D. W. Rathod, J. Balakrishnan, N. M. Irvine
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2019)
Article
Materials Science, Multidisciplinary
G. Obasi, E. J. Pickering, A. N. Vasileiou, Y. L. Sun, D. Rathod, M. Preuss, J. A. Francis, M. C. Smith
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Dinesh W. Rathod, Yongle Sun, Gideon Obasi, Matthew J. Roy
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Engineering, Manufacturing
Surinder Tathgir, Dinesh W. Rathod, Ajay Batish
MATERIALS AND MANUFACTURING PROCESSES
(2019)
Article
Engineering, Manufacturing
Surinder Tathgir, Dinesh W. Rathod, Ajay Batish
MATERIALS AND MANUFACTURING PROCESSES
(2020)
Proceedings Paper
Metallurgy & Metallurgical Engineering
J. A. Francis, M. C. Smith, B. Jeyaganesh, A. N. Vasileiou, D. W. Rathod, M. J. Roy, N. M. Irvine
RESIDUAL STRESSES 2016: ICRS-10
(2017)