Article
Materials Science, Multidisciplinary
Hyungsoo Lee, Hi Won Jeong, Seong Moon Seo, Dae Won Yun, Kyungmi Park, Kwang Hyuk Yim, Young Soo Yoo
Summary: The study investigated the optimal process parameters of grade 250 maraging steel for hot forging using a process map and microstructure analysis. Flow stress-strain curves were calibrated by Bayesian artificial neural network modeling to compensate the heat generated by dynamic deformation. The Ni and Mo segregation during solidification impacted the recrystallization behavior during hot compression, revealing favorable process conditions for wide process windows.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Bibin Jose, Manikandan Manoharan, Arivazhagan Natarajan, Nageswara Rao Muktinutalapati, G. Madhusudhan Reddy
Summary: Maraging steels, widely used in strategic sectors, are prone to the formation of reverted austenite phase during welding, which reduces mechanical performance of joints. This study introduced a novel dual-pulse gas metal arc welding technique that significantly reduced heat-input and the formation of reverted austenite phase compared to conventional gas metal arc welding.
Article
Materials Science, Multidisciplinary
Yao Xu, Brajendra Mishra, Sneha P. Narra
Summary: Wire arc additive manufacturing is a suitable manufacturing process for large-scale components due to its high deposition rates and low feedstock costs. However, the thermal cycles and heat accumulation in this process can result in microstructural transformations, making it necessary to study the process-structure-property relations.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Mechanical
Jong-Wook Park, Hee-Young Jung, Wonki Jeong, Se-Eun Shin, Hidetoshi Fujii, Hyun-Joon Kim, Seung-Joon Lee
Summary: The present study aimed to investigate the microstructure, mechanical properties, and wear resistance of S45C steel after friction-stir welding (FSW) by using sliding wear test, 3D laser scanning microscope, and electron backscattered diffractometer. The base metal exhibited adhesive/abrasive wear with long ploughing and cutting. After FSW, the thermo-mechanical affected zone showed improved wear resistance with only abrasions due to accumulated dislocations and grain refinement through continuous dynamic recrystallization. The stir zone exhibited the highest wear resistance due to its higher strain hardening capability with short ploughing and cutting.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Tomoya Nagira, Xiaochao Liu, Kohasaku Ushioda, Hidetoshi Fujii
Summary: The grain refinement mechanisms in pure and high-purity Al were studied during rapid cooling friction stir welding using liquid CO2. The potential mechanisms identified include DDRX, CDRX, and geometric dynamic recrystallization. Increasing welding temperature and Al purity encouraged dynamic recovery, leading to the acceleration of CDRX and inhibition of DDRX. Texture development was closely related to grain structure development, with both C- and B-type shear textures observed in the microstructures.
Article
Metallurgy & Metallurgical Engineering
Xueli Wang, Xin Ji, Bin He, Dongpo Wang, Chengning Li, Yongchang Liu, Wei Guan, Lei Cui
Summary: This study explored a strategy for predicting the proportion of M-A constituents and impact toughness of SZ on FSW-welded X80 pipeline steel joints. The key variables influencing the characteristics of M-A constituents and impact toughness were found to be the welding forces. The impact toughness of SZ is commonly lower than that of the base material due to the formation of lath bainite and coarsening of austenite. A ML model constructed using force features as input data set exhibited higher accuracy in predicting M-A constituents and impact toughness compared to models built with welding parameters.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Mahdi Mahmoudiniya, Leo A. Kestens
Summary: Microstructure development and texture evolution during friction stir welding of DP700 dual-phase steel were investigated in this study. Continuous dynamic recrystallization was found to be the predominant mechanism for ferrite recovery, with additional geometrically dynamic recrystallization observed in the thermomechanically affected zone. Different shear texture components were formed in various regions due to different thermomechanical conditions.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Nicolene van Rooyen, Madhumanti Bhattacharyya, Indrajit Charit, Michael R. Maughan
Summary: Simulated cracks in 304L stainless steel were repaired using low temperature friction stir welding. Indentation studies were conducted to understand the influence of microstructural features on mechanical properties across the weld and to measure the size of the weld zones quantitatively.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Ashraf bin Ariffin, Mohd Ridha bin Muhamad, Sufian Raja, Mohd Fadzil Jamaludin, Farazila Yusof, Tetsuo Suga, Huihong Liu, Yoshiaki Morisada, Hidetoshi Fujii
Summary: The joining between lightweight magnesium alloys and steel is challenging due to the immiscible properties between these metals. In this study, a new method called friction stir alloying (FSA) was proposed to solve this problem. By adding carbon nanotubes (CNT) and copper powder between the workpieces and performing friction stir welding (FSW) at different traverse speed and constant rotational speed, the researchers successfully achieved the joining of magnesium alloys and steel. The analysis of the microstructure and mechanical properties of the joints showed that the addition of CNT and copper significantly improved the mechanical performance of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Mohammadreza Rafati, Amir Mostafapour, Hossein Laieghi, Mahesh Chandra Somani, Jukka Komi
Summary: The paper compares the microstructural and mechanical properties of CK45 carbon steel plates joined by friction stir (FSW) and tungsten inert gas (TIG) welding methods. Good joints were achieved through proper process parameters and filler metal selection. Optimized water cooling and use of specific filler metals can mitigate brittle behavior in the welded samples.
Article
Materials Science, Multidisciplinary
M. Zhang, Y. D. Wang, P. Xue, H. Zhang, D. R. Ni, K. S. Wang, Z. Y. Ma
Summary: A new friction stir welding method without contacting the tool and the steel plate was reported in this study, and an ordinary H13 steel tool can be used. By using a thickened Al alloy plate, a high-quality joint between 1060Al and SUS304 stainless steel was successfully obtained, with excellent metallurgical bonding achieved at the Al-steel interface.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Connor Strawn, Alvin M. Strauss
Summary: The study proposes a new derivative process called butted friction stir forming (BFSF), which can join dissimilar materials without modification to traditional tools and equipment. By filling threaded holes in aluminum alloy workpieces through downward force and stirring action, a mechanical interlock is formed. The results of the experiments provide a valid proof of concept for further development in BFSF methods.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Materials Science, Multidisciplinary
Chen Zhao, Shuai Li, Binbin Wang, Naiqian Wang, Qi Zhang, Yufeng Sun, Liguo Wang, Shaokang Guan
Summary: The effect of rotation speeds ranging from 100 to 600 rpm on the microstructure and mechanical properties of friction stir welded (FSW) DP1180 steel joints was investigated. Various microscopy techniques were employed to examine the microstructure in different weld zones. The results showed that the rotation speed influenced the microstructure and mechanical properties, with the highest tensile strength observed at 100 rpm.
Article
Materials Science, Multidisciplinary
Mohamed Ragab, Hong Liu, Mohamed M. Z. Ahmed, Guan-Jun Yang, Zheng-Ji Lou, Ghazanfar Mehboob
Summary: This study investigates the effect of tool rotation speed on the microstructure evolution of friction stir welded martensitic stainless steel. The results show differences in microstructure between different weld zones, including grain refinement and hardness variations. The heat-affected zone (HAZ) was found to have different subzones with varying hardness values, suggesting different thermal histories during welding.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Zhiwei Wang, Min Zhang, Cong Li, Fenglei Niu, Hao Zhang, Peng Xue, Dingrui Ni, Bolv Xiao, Zongyi Ma
Summary: In this study, the reliable welding of T91 heat-resistant steel to 316L stainless steel was improved through friction stir welding, resulting in a defect-free joint with a large bonding interface. The joint exhibited both mechanical mixing and metallurgical bonding at the bonding interface, and the material was renovated in the weld zone, leading to a high-strength welded joint comparable to the parent metal.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
