Article
Materials Science, Multidisciplinary
Yuxiu Zhang, Honghui Kang, Chunyu Wang, Hiromi Nagaumi, Xuyue Yang
Summary: A Mg-1.0Mn-1.0Zn (wt.%) alloy with ultra-high strength was prepared by extrusion at 438 K and forging at 453 K. The alloy achieved high tensile yield strength of 373 MPa and ultimate tensile strength of 417 MPa with only 2 wt% low-cost alloying element additions, due to the combination of ultrafine dynamic recrystallized grains, high-density dislocations, nanoscale precipitates, and strong texture. It is believed that this low-temperature deformation method can be widely applied in industrial fields to fabricate other low-alloyed Mg alloys with ultra-high strength.
Article
Chemistry, Physical
Jiaying Huang, Siyu Feng, Shiyong Li, Cuilan Wu, Jianghua Chen
Summary: The study systematically investigated the localized corrosion behavior and microstructure of an Al-2.23Cu-0.96Li (wt%) alloy using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the GPB zones in the alloy do not significantly affect the overall propagation direction of crystallographic corrosion, but are closely related to the formation of nanoscale localized corrosion morphology in the crystallographic corrosion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feifei Wu, Mengjun Long, Pengcheng Ye, Feng Jiang, Jingyu Jiang
Summary: The oxidiation behavior of Al-Mg-Sc alloy at 200 degrees C was investigated, with analysis of the structure and composition of the oxide film on the alloy surface. It was found that MgAl2O4 was mainly distributed at the bottom of the oxide film, promoting its formation at the interface.
Article
Materials Science, Multidisciplinary
Yuting Lv, Xianwei Lang, Chunjian Su, Lianmin Cao, Liqiang Wang
Summary: A new strengthening mechanism is discovered in (CuZnMnNi)100-xSnx high entropy brass alloy prepared by mechanical alloying and fast hot pressing sintering, where stacking faults and nano-twins dominantly contribute to the strengthening.
Article
Materials Science, Multidisciplinary
Xuan Zhou, Li Fu, Jun Cheng, Yong Mao
Summary: The hot deformation characteristics of Ti-25Al-14Nb-2Mo-1Fe alloy were systematically studied in this work. Additionally, a processing map was established to further analyze the machinability properties. Through analysis and observation, the instability and stability domains were identified, and the optimal working parameters for the alloy were determined (950-970 degrees C/0.001-0.01 s(-1), 1015-1100 degrees C/0.001-0.01 s(-1)), which can optimize the hot working parameters.
Article
Materials Science, Multidisciplinary
Gang Zeng, Hairan Li, Chao Cao, Xiaojie Zhou, Xinkai Kang, Hongchao Xiao, Xianzheng Lu
Summary: Superlight Mg-10Li-3Al-3Zn (LA103Z) alloy cabins were fabricated using multi-directionally forging, die forging, and annealing treatment. The cabins showed a combination of different phases including alpha-Mg, beta-Li, AlLi, MgLi2Al, and Mg17Al12. The die-forged cabin at 260 degrees C and 6 mm/s exhibited superior strength due to the sufficient dissolution of AlLi phases, fine grain size, and reasonable distribution of MgLi2Al particles. Further annealing at 245 degrees C for 3 h resulted in the optimal mechanical properties with high tensile strength and elongation. This study provides a feasible method for producing high-performance large-scale Mg-Li components.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Khaja Moiduddin, Arshad Noor Siddiquee, Mustufa Haider Abidi, Syed Hammad Mian, Muneer Khan Mohammed
Summary: The study demonstrates that using friction stir welding (FSW) can successfully weld magnesium alloy plates with a thickness of 11.5 mm, achieving high joint efficiency and excellent weld integrity. Proper optimization of rotational speed and traverse speed is crucial for welding quality, and dynamic recrystallization reduces the grain size significantly in the stir zone.
Article
Materials Science, Multidisciplinary
Alexander Brust, Eric Payton, Toren Hobbs, Vikas Sinha, Victoria Yardley, Stephen Niezgoda
Summary: The study suggests that probabilistic austenite reconstruction using graph cutting technique can accurately identify annealing twins in austenite grains, even in the presence of a large fraction of poorly indexed data points.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Chemistry, Physical
P. Emadi, B. Andilab, K. Borodianskiy, C. Ravindran
Summary: The use of lightweight alloys, such as magnesium, is crucial for improving fuel efficiency and reducing emissions in automobiles, as well as increasing the range of electric vehicles. This study investigated the effects of SiC nanoparticles on the microstructure and mechanical properties of Mg-Al-Zn-Mn alloy composites. The addition of SiC resulted in significant grain refinement, more uniform phase dispersion, and improved tensile strength, making it a promising material for strengthening light alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Hiroyuki Watanabe, Toru Murata, Shunsuke Nakamura, Naoko Ikeo, Toshiji Mukai, Koichi Tsuchiya
Summary: Cold-working was found to facilitate the formation of sigma phase in CrMnFeCoNi alloy under specific heat treatment conditions. The resulting sigma-body-centered cubic (BCC) aggregates consist of sigma phase spines and BCC particles, forming rapidly at the face-centered cubic/sigma interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xinwei Xiao, Shuai Xu, Dashan Sui, Haiming Zhang
Summary: Electric assisted plasticity is a promising technology for improving the formability of hard-deformed materials like Mg alloys. The electroplastic effect (EPE) affects the material's strength and suppresses deformation twinning, while facilitating the activation of non-basal slip.
Article
Materials Science, Multidisciplinary
Shaowei Wang, Zhanyong Zhao, Peikang Bai, Wenbo Du, Liang Li
Summary: The graphene/Ti6Al4V composite prepared by selective laser melting showed that the addition of graphene significantly affected the microstructure of the composite, resulting in a finer internal structure and strong interface bonding between TiC and alpha-Ti.
Article
Materials Science, Multidisciplinary
Haonan Wang, Wen Wang, Bowen Li, Peng Han, Hairui Xie, Kuaishe Wang
Summary: Nb-1Zr alloy plates were successfully friction stir welded using a W-Re alloy tool, and various dynamic recrystallization processes were observed. The welded joint exhibited different regions, and the thermo-mechanically affected zone and stir zone showed significantly increased hardness after welding.
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feng Jiang, Jingyu Jiang
Summary: The high temperature oxidation behavior of Al-Mg-Sc alloy was investigated, and the structure, composition and microstructure evolution near the interface were analyzed. The oxide layer was mainly composed of MgO and small amounts of MgAl2O4, and the phenomenon of grain boundary wetting by the second solid phase was observed.
Article
Chemistry, Physical
F. Belelli, R. Casati, C. Andrianopoli, F. Cuccaro, M. Vedani
Summary: Only a few high strength aluminum alloys can be processed using Laser Powder Bed Fusion due to the occurrence of hot cracks during solidification. The addition of zirconium and scandium in aluminum-magnesium alloys has been proven effective in suppressing solidification cracking and improving strength. Therefore, it is necessary to focus on novel aluminum alloys with enhanced processability and low scandium content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Darothi Bairagi, Venkataramana Munukuti, Pallabi Bhuyan, Rajib Saha, Sumantra Mandal
Summary: The study found that cementite spheroidization in high-carbon steel can significantly improve the impact toughness and corrosion resistance of the material. The higher the degree of spheroidization, the better the performance of the material.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2021)
Article
Nanoscience & Nanotechnology
Achintya Kumar Patra, C. N. Athreya, Sumantra Mandal, K. C. Hari Kumar, Subramanya Sarma
Summary: This study focused on the development of medium Mn steels, aiming to achieve a high tensile strength-high ductility combination through computational design and thermomechanical processing. By optimizing the alloy chemistry and microstructure, the designed steel successfully demonstrated high ductility and strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
S. K. Pradhan, P. Bhuyan, L. R. Bairi, S. Mandal
Summary: The individual implications of sensitization, grain size, residual strain, and grain boundary characteristics on the semiconducting response of passive film in 304 stainless steel were investigated. Higher donor densities in the sensitized specimen deteriorated passive film stability, while a greater density of random grain boundaries promoted defect formation in the film. In contrast, a higher fraction of 'special' boundaries and triple junctions, achieved through grain boundary engineering, suppressed defect formation and enhanced passive film protection.
Article
Chemistry, Physical
P. Bhuyan, M. Paliwal, V. Subramanya Sarma, B. de Boer, R. Mitra, S. Mandal
Summary: In this systematic study on a Ni-based superalloy, it was found that the evolution of precipitates during aging significantly affects the high-temperature hot corrosion performance. The improved corrosion resistance was attributed to the rapid formation of oxide layer and the presence of undissolved carbides at grain boundaries, which hindered the inward transport of corrosive species.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Partha Duley, Souriddha Sanyal, T. K. Bandyopadhyay, Sumantra Mandal
Summary: In this study, annealing treatments were conducted on magnesium alloys forged at different temperatures. The specimens forged at 573 K and subsequently annealed at 623 K for 5 min exhibited a better combination of tensile properties compared to the other specimens, attributed to the unique grain size heterogeneity and the presence of finer and coarser second phase particles.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
S. Sanyal, O. G. Gabhale, T. K. Bandyopadhyay, S. Mandal
Summary: A cast Mg-1Al-0.28Ca-0.13Mn-0.5Si alloy was subjected to solution-annealing at 723 K followed by aging treatment at 473 K. The peak-aged specimen showed excellent strengthening with a significant increase in yield and ultimate tensile strength, but at the expense of decreased ductility. The evolution of nano-sized Al-Mn particles and coarse Ca-rich phases during aging, as well as the precipitate-dislocation interactions involving Al8Mn5 phase, play important roles in the strengthening of the developed alloy at different aging stages.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
K. Arun Babu, T. S. Prithiv, Abhinav Gupta, Sumantra Mandal
Summary: A cellular automaton (CA) model has been established for predicting flow stress, DRX grain size, and DRX fraction of super austenitic stainless steel under different strain rates and temperatures, which has been further optimized and used for establishing ANN-based constitutive models. A modified cellular automata (CAM) model has been developed to numerically consider the solute drag effect, showing improved accuracy in predicting microstructure evolution and flow behavior of the alloy under non-isothermal deformation conditions.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Rahul Rakshit, Arnab Sarkar, Sushanta Kumar Panda, Sumantra Mandal
Summary: A detailed investigation was conducted on the microstructure and micro-texture evolution in Al-Li alloy following deformation at various strain paths. The correlation between microstructural and micro-textural developments with the different strain paths was established. The development of Brass{110} 112 100 001 011 112 634 100 011 112 was observed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
K. Arun Babu, Yahya H. Mozumder, C. N. Athreya, V. Subramanya Sarma, Sumantra Mandal
Summary: The study showed that the initial grain size has an impact on the hot compression characteristics of super-304H austenitic stainless steel at different strain rates. The occurrence of both CDRX and DDRX mechanisms in fine-grained specimens at low strain rates, while mainly CDRX in coarse-grained specimens at all strain rates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
S. Kumar, A. Sarkar, A. Durga Prasad, M. Paliwal, S. Mukherjee, Sumantra Mandal
Summary: This study investigates the complex interplay between microstructural features and tensile properties in a Ni-modified medium manganese steel under the combined influence of cold rolling and annealing treatment. The results show that the annealing temperature affects the microstructure, grain size, and recrystallization fraction, which in turn influence the mechanical properties of the material. The CR-1073K annealed specimen exhibits a duplex phase microstructure, optimum grain size of austenite and ferrite, and the co-occurrence of recrystallized and deformed grains, resulting in excellent strength-elongation synergy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
S. Das, S. Sanyal, P. Halder, A. Varma, Y. Ravi Kumar, S. Mandal
Summary: The study investigated the oxidation response of T91 steel in dry air environment at elevated temperatures, revealing significant influence of temperature and exposure time on oxidation rate. Dual oxide layers were found in the oxide scales, with cracks forming and worsening at higher temperatures. The kinetics of oxidation were described using Arrhenius type equation, predicting thickness of oxide scales based on Q and k(p) values.
METALS AND MATERIALS INTERNATIONAL
(2022)
Review
Metallurgy & Metallurgical Engineering
Darothi Bairagi, Sumantra Mandal
Summary: Magnesium and its alloys have gained significant attention as a viable option for temporary implants in the past two decades. Their biodegradable nature, excellent biocompatibility, and similarities to natural bone make them highly desirable in orthopedic implant applications. This review article provides an overview of recent advancements in the field of magnesium-based biodegradable implants, including alloy development, fabrication techniques, mechanical properties, degradation behavior, and clinical application progress. The article also discusses the degradation mechanisms and challenges in physiological environments, as well as surface coating techniques to reduce degradation rates.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Engineering, Manufacturing
P. S. Lin Prakasha, Rahul Rakshit, Sumantra Mandal, Gour Gopal Roy, Sushanta Kumar Panda
Summary: The deformation behavior of electron beam welded commercially pure (CP) Ti and Ti6Al4V joints was investigated through uniaxial tensile tests. It was found that the fusion zone (FZ) has higher microhardness than CP Ti due to the presence of low strained needle-like α' martensite and higher concentration of alloying elements. In uniaxial tensile deformation, failure occurred in the CP Ti side of the welded specimen, primarily due to preferential plastic deformation and the formation of ET and CT twins. The SF analysis revealed the dominance of prismatic slip systems initially, but with the activation of basal slip and formation of CT and ET twins during deformation due to inadequate slip systems.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Nanoscience & Nanotechnology
Yahya H. Mozumder, Rahul Rakshit, Debarpan Ghosh, Lakhindra Marandi, Sumantra Mandal
Summary: In this study, nano-indentation tests were performed on the Fe-Mn-Al-Ni-C duplex lightweight steel to investigate its mechanical properties after hot compression. The results show that the steel has relatively high elastic modulus values in the BCC and FCC matrix regions, and the onset of plasticity is influenced by both homogeneous dislocation nucleation mechanism and multiplication of pre-existing dislocations. The BCC + B2 region exhibits higher maximum shear stress compared to the FCC + x-carbide region, indicating that plastic deformation first initiates in the latter region. Additionally, random pop-in events are observed in the elasto-plastic regime of the indentation loading curve, which are attributed to the resistance generated by intragranular precipitates against dislocation motion.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Industrial
Rahul Rakshit, Bhupesh Singh Katiyar, Carlos N. Tome, Sushanta Kumar Panda, Sumantra Mandal
Summary: The study investigates the effect of strain path on microstructure and micro-texture evolution in AA8090 alloy during single point incremental forming. Different strain paths were achieved by forming truncated pyramidal geometries with wall angles of 45 degrees and 60 degrees. Finite element simulations were used to study the effect of wall angle on thickness reduction and strain evolution, while multiscale visco-plastic self-consistent simulations were conducted to elucidate the effect of shear strains on micro-texture evolution. The presence of shear components in the deformation deviates the rotation path of orientations, resulting in spread of orientation and reduced lattice reorientation rate, which weakens the micro-texture evolution.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
