Article
Nanoscience & Nanotechnology
P. Xia, F. Vercruysse, C. Celada-Casero, P. Verleysen, R. H. Petrov, I Sabirov, J. M. Molina-Aldareguia, A. Smith, B. Linke, R. Thiessen, D. Frometa, S. Parareda, A. Lara
Summary: This study focuses on the impact of alloying and microstructure on the formability of advanced high strength steels processed via quenching and partitioning. The results show that changes in the fraction of retained austenite can affect plastic strain, but the steel with the highest retained austenite fraction may lead to the formation of microcracks, resulting in reduced formability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Ramadan N. Elshaer, Mohamed K. El-Fawakhry, Ahmed I. Z. Farahat
Summary: The effects of quenching after martensitic finish (QAM(f)) and quenching & partitioning (Q&P) on microstructure evolution and mechanical properties of low and medium carbon hot rolled steels were investigated. While QAM(f) process increased uniform elongation and ultimate tensile strength (UTS) in low carbon steel, Q&P process reduced uniform elongation but significantly increased UTS in medium carbon steel. Both processes showed changes in strain hardening instability zones compared to the hot-rolled process, with Q&P process greatly decreasing the instability zone in medium carbon steel.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Shan Chen, Jun Hu, Lingyu Shan, Chenchong Wang, Xianming Zhao, Wei Xu
Summary: Steel treated by quenching and partitioning process shows an excellent combination of strength and ductility by utilizing the transformation-induced plasticity effect of retained austenite. The occurrence of bainitic transformation during the partitioning process significantly influences the microstructure and mechanical properties of the steel, especially on the elongation performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Industrial
Yong Hou, Junying Min, Nan Guo, Yifei Shen, Jianping Lin
Summary: The yield behavior of different strength grades of Q&P steel and dual-phase steel were compared, showing that Q&P steels exhibit significant strain hardening and anisotropic hardening, while the dual-phase steel does not have these characteristics. Furthermore, a modified yield criterion was developed under non-associated flow rule to accurately describe the asymmetric yield surfaces of the investigated Q&P steels.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Kewen Dong, Congying Lu, Wentao Zhou, Derek O. Northwood, Cheng Liu
Summary: The study developed a new quenching and partitioning process for unalloyed ductile iron, revealing the significant influence of multiphase microstructure on material properties. The content and stability of retained austenite were found to play a crucial role in both strength and elongation.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Nanoscience & Nanotechnology
M. Wallner, K. Steineder, R. Schneider, C. Commenda, C. Sommitsch
Summary: The effect of galvannealing treatment after quenching and partitioning process on the microstructure and mechanical behavior of medium-Mn steels was investigated. The replacement of Si by Al was found to influence the morphology and stability of retained austenite. The GA treatment led to significant decomposition of RA in Si-steel, while there was no significant reduction in RA content in Al-alloyed steel. The different decomposition behaviors were reflected in the mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhisong Chai, Jun Hu, Chenchong Wang, Lingyu Wang, Weihua Sun, Sybrand van der Zwaag, Wei Xu
Summary: The effect of Nb content on the phase transformation kinetics, microstructure, and mechanical properties of hot-rolled quenching and partitioning (Q&P) steel has been investigated. Results show that an increase in Nb content leads to an increase in ultimate tensile strength (UTS) but a decrease in elongation at break.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ilkka Miettunen, Sumit Ghosh, Mahesh C. Somani, Sakari Pallaspuro, Jukka Komi
Summary: Traditional quenching and partitioning (Q&P) treated steels are usually alloyed with silicon (Si) but the exact role of Si in microstructural mechanisms during partitioning process is not fully understood. This study combines dilatometric analysis with detailed microstructural characterization to reveal competing mechanisms during partitioning. Three 0.4 wt.% carbon steels with varying Si contents were quenched and partitioned at different temperatures, showing that Si content affects bainitic transformation, austenite retention, and carbide precipitation. Silicon retards austenite decomposition at higher temperatures but does not improve carbon partitioning at lower temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Florian Vercruysse, Carola Celada-Casero, Bernd M. Linke, Patricia Verleysen, Roumen H. Petrov
Summary: This study found that Nb Q&P steel exhibited excellent low temperature performance and improved high temperature dynamic behavior, mainly due to the grain refinement induced by Nb and the stabilizing effect of Nb on retained austenite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Pengfei Gao, Feng Li, Ke An, Zhengzhi Zhao, Xiaohong Chu, Heng Cui
Summary: This study investigates the effect of silicon content on the microstructure and mechanical properties of quenching and partitioning (QP) steel. Adding silicon increases the strength and ductility of the steel, and forming a multiphase structure in QP steel leads to better mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Mechanics
Min Chan Kim, Lopamudra Palodhi, Joung Sook Hong, Manoranjan Mishra
Summary: The coupled effects of thermodynamic and hydrodynamic instabilities during viscous fingering (VF) are studied using a modified Cahn-Hilliard phase-field model. The temporal evolution of spatial inhomogeneities is investigated by describing the free energy using a modified Flory-Huggins model. The governing equations are solved using COMSOL multiphysics software, and the results are in agreement with experimental and numerical results obtained using classical models. The effects of the Margules parameter and gradient parameter on VF are systematically studied, showing asymmetric features and a stronger thermodynamic effect with increasing phase separation and droplet formation.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Nanoscience & Nanotechnology
E. I. Hernandez-Duran, V. Bliznuk, T. Ros-Yanez, R. Iquilio-Abarzua, F. M. Castro-Cerda, R. H. Petrov
Summary: The study on Fe-0.24C-1.4Mn-1.4Si steel revealed that Q&P steel grades exhibit enhanced mechanical behavior compared to DQ counterparts, with improved yield strength, uniform elongation, and total elongation after partitioning at 400 degrees C. While the ultimate tensile strength of Q&P steels decreased compared to DQ steels annealed at the same peak temperature, the final strength-ductility balance of Q&P steels was superior to DQ steel grades, attributed to an interplay between a sustainable TRIP effect and effective strain-stress partitioning among the microconstituents resulted after the Q&P process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
P. K. Kantanen, V. Javaheri, M. C. Somani, D. A. Porter, J. I. Komi
Summary: The study describes the effect of austenite deformation on carbon partitioning and transformation to athermal and isothermal martensite, and bainite during quenching and partitioning (QP). It was found that deformation close to the no-recrystallization temperature refines the grain size, lowers the martensite start temperature and affects the stability of austenite during QP processing. These results can help in designing optimal QP treatments for these novel steels by corroborating the QP microstructures and their hardness through dilatation measurements and retained austenite contents at room temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Mechanical
Jun Hua, Jiapeng Liu, Pengtao Liu, Xiujuan Zhao, Chunhuan Chen, Ruimin Ren
Summary: This study investigates the fatigue spalling process and mechanism of the white etched area (WEA) caused by laser quenching surface treatment of U71MnG rail material. The results show that the surface pearlite deforms under normal stress and creep force during the initial wear stage, while the WEA remains unaffected. Cracks form at the contact between the initial position of the WEA and the substrate due to discordant plastic deformation, which then propagate into the WEA. With increasing rolling cycles, cracks gradually shift into the middle of the WEA, form branch cracks, and eventually intersect, resulting in spalling. The plastic flow of the substrate covers the WEA surface at the terminal position, and WEA edge fracture occurs due to bending under normal stress. Plastic deformation enhances the surface hardness of the WEA, and the apparent plastic deformation of the substrate beneath the WEA suggests that the WEA flows under the influence of creep forces.
Article
Metallurgy & Metallurgical Engineering
Zhirui Wei, Xiaolong Gan, Man Liu, Junyu Tian, Zhenye Chen, Guang Xu
Summary: Different heat treatments can improve the wear performance of low-carbon, high-strength steel. The wear resistance of QP steel is better at a quenching temperature of 220 degrees C, but decreases at 190 degrees C. Highly impact energy can greatly improve the relative wear resistance of QP steel due to its better fracture toughness.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Maxim Gussev, Jason Allen, Xiaohua Hu, Abdel R. Moustafa, Derek A. Splitter, Amit Shyam
MATERIALS & DESIGN
(2020)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Xiaohua Hu, Xin Sun
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Xiaohua Hu, Xin Sun, Anupam Vivek, Glenn Daehn, David Cullen
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Xiaohua Hu, Hyuk Jong Bong, Somnath Ghosh, Xin Sun
Summary: The paper proposes a modification to the conventional finite element weak form to fully incorporate twin-induced heterogeneous deformation without depending on the pseudo-slip assumption. The model successfully captures twin-induced strain localization and associated stress-reversal phenomena.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Lianghua Xiong, Jiahao Cheng, Andrew Chihpin Chuang, Xiaohua Hu, Xin Sun, Dileep Singh
Summary: This study investigates the characteristics of the Mg-steel interface joined by impact welding method, revealing the formation of a deposit layer at the joint interface with pores and cracks inside. Insights into the immiscible Mg-steel joining process are provided through the analysis of the void/cracking evolution in the deposit layer.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
J. J. Mueller, X. Hu, X. Sun, Y. Ren, K. Choi, E. Barker, J. G. Speer, D. K. Matlock, E. De Moor
Summary: In this study, through experiments and simulations, the microstructure evolution of Fe-0.19C-4.39Mn steel during intercritical annealing was investigated, revealing that the generation of austenite during intercritical annealing may not be solely preserved in the initial martensitic microstructure, but possibly generated through nucleation and growth of new austenite.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Xiaohua Hu, Josh J. Mueller, Xin Sun, Emmanuel De Moor, John G. Speer, David K. Matlock, Yang Ren
Summary: The microstructural changes in a medium manganese steel during thermal processing were evaluated using HEXRD, showing that the 30-min hold time was insufficient to reach equilibrium conditions and the austenite fraction increased during isothermal holding. The observed changes in lattice parameters were interpreted to be caused by the redistribution of C and Mn between austenite and ferrite.
FRONTIERS IN MATERIALS
(2021)
Article
Mechanics
Jiahao Cheng, Ryan Lane, Michael S. Kesler, Jamieson Brechtl, Xiaohua Hu, Reza Mirzaeifar, Orlando Rios, Ayyoub M. Momen, Kashif Nawaz
Summary: In this study, nanoindentation experiments and crystal plasticity finite element model were used to investigate the single-crystal properties and sensitivity of parameters of cerium and magnesium strengthened aluminum alloys. Satisfactory matching between experiment and simulation was obtained for each individual grain. The dependence of hardness on indent depth, as well as the effect of grain orientation and neighboring grains to nanoindentation behavior, were discussed.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Patxi Fernandez-Zelaia, Xiaohua Hu, Michael Kirka
Summary: This paper investigates the fatigue crack growth behavior of hybrid microstructure Haynes 282 fabricated via PBF-AM. The simulation results showed a consistent influence of grain structure and texture on crack propagation, as was seen in the experiment. The presented modeling approach will facilitate the development of accurate microstructure design in additive manufacturing.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Hyuk Jong Bong, Xiaohua Hu, Xin Sun, Yang Ren
Summary: A multiscale crystal plasticity model considering temperature-dependent mechanical behaviors was developed and validated in grain-scale and macroscale simulations. It provides an efficient and precise modeling scheme for magnesium alloys at elevated temperatures.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Xiaohua Hu, Drew Lancaster, Xin Sun, William Joost
Summary: A microstructure-based finite element computational model was developed to study the mechanical behavior of a plasma-sprayed aluminum-silicon/polyester coating used in gas turbine engines. The model successfully captured the plastic deformation and failure of the material, and was validated with experimental tests. It provides guidance for the design of improved abradable materials.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jiahao Cheng, Hyuk Jong Bong, Hua Qiao, Xiaohua Hu, Xin Sun, Somnath Ghosh, Peidong Wu
Summary: This paper compares three crystal plasticity-based modeling approaches for twinning in magnesium alloys and analyzes their accuracy and computational efficiency in simulating stress-strain behavior and lattice strains. The findings provide guidance for selecting an appropriate model based on specific modeling targets.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Xiaohua Hu, Sumit Bahl, Amit Shyam, Alex Plotkowski, Brian Milligan, Lawrence Allard, James A. Haynes, Yang Ren, Andrew Chuang
Summary: The ACMZ cast family of alloys offers unique properties and value propositions for future vehicles. A recent study demonstrated that higher-Cu ACMZ fabricated with laser powder bed fusion additive manufacturing (AM) results in an increase in both ductility and strength when compared to as-aged microstructure of cast alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Jiahao Cheng, Xiaohua Hu, Michael Kirka
Summary: High-cycle fatigue life in metallic materials is affected by microstructure features, but traditional data-based approaches lack consideration for microstructure and crystal plasticity-based methods are computationally expensive. In this study, an acceleration method based on the cycle-jump approach was developed for efficient microstructure-based high-cycle fatigue finite element simulation.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Automation & Control Systems
Hui Huang, Jian Chen, Jiahao Cheng, Yong Chae Lim, Xiaohua Hu, Zhili Feng, Xin Sun
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
