Publications
51 results found
Dovgyy B, Minh-Son P, 2018, Epitaxial Growth in 316L Steel and CoCrFeMnNi High Entropy Alloy Made by Powder-bed Laser Melting, 21st International ESAFORM Conference on Material Forming (ESAFORM), Publisher: AMER INST PHYSICS, ISSN: 0094-243X
- Author Web Link
- Cite
- Citations: 5
Minh-Son P, Hooper P, 2017, Roles of Microstructures on Deformation Response of 316 Stainless Steel Made by 3D printing, 20th International ESAFORM Conference on Material Forming, Publisher: AMER INST PHYSICS, ISSN: 0094-243X
Pham MS, Dovgyy B, Hooper PA, 2017, Twinning induced plasticity in austenitic stainless steel 316L made by additive manufacturing, Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol: 704, Pages: 102-111, ISSN: 0921-5093
Additively manufactured (AM) 316L steel exhibits extraordinary high yield strength, and surprisingly good ductility despite the high level of porosity in the material. This detailed study sheds light on the origins of the observed high yield strength and good ductility. The extremely fine cells which are formed because of rapid cooling and dense dislocations are responsible for the macroscopically high yield strength of the AM 316L (almost double of that seen in annealed 316L steel). Most interestingly, twinning is dominant in deformed samples of the AM316. It is believed that twinning-induced plasticity (TWIP) behaviour to be responsible for the excellent ductility of the steel despite the high level of porosity. The dominant twinning activity is attributed to Nitrogen gas used in 3D printing. Nitrogen can lower the stacking fault energy of the steel, leading to the disassociation of dislocations, promoting the deformation twinning. Twinning induces large plasticity during deformation that can compensate the negative effect of porosity in AM steel. However, twinning does not induce significant hardening because (1) the porosity causes a negative effect on hardening and (2) twinning spacing is still larger than extremely fine solidification cells.
Pham MS, Creuziger A, Iadicola M, et al., 2017, Roles of texture and latent hardening on plastic anisotropy of face-centered-cubic materials during multi-axial loading, Journal of the Mechanics and Physics of Solids, Vol: 99, Pages: 50-69, ISSN: 0022-5096
This study investigates the joint impact of preferred texture and latent hardening on the plastic anisotropy of face centered cubic (FCC) materials. The main result is that both aspects have significant impact on the anisotropy, but the two can either counteract each other or synergistically reinforce each other to maximize anisotropy. Preferred texture results in significant anisotropy in plastic yielding. However, the latent hardening significantly alters the texture-induced anisotropy. In addition, one latent hardening type can cancel out the anisotropy of another type. Consequently, if all dislocation-based latent hardening types are included at the same level as the self-hardening, the result might not reveal the complexity of plastic anisotropy. The present study of the synergistic influence of detailed latent hardening and texture presented helps provide new insights into the complex anisotropic behavior of FCC materials during multi-axial forming.
Jeong Y, Minh-Son P, Iadicola M, et al., 2016, Forming limit prediction using a self-consistent crystal plasticity framework: a case study for body-centered cubic materials, MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, Vol: 24, ISSN: 0965-0393
Pham S, Jeong Y, Creuziger A, et al., 2016, Crystal plasticity-based modeling for predicting anisotropic behaviour and formability of metallic materials, 10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (NUMISHEET), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Minh-Son P, Rollett AD, Creuziger A, et al., 2016, Crystal Plasticity Analysis of Constitutive Behavior of 5754 Aluminum Sheet, 19th International ESAFORM Conference on Material Forming (ESAFORM), Publisher: AMER INST PHYSICS, ISSN: 0094-243X
- Author Web Link
- Cite
- Citations: 1
Minh-Son P, Iadicola M, Creuziger A, et al., 2015, Thermally-activated constitutive model including dislocation interactions, aging and recovery for strain path dependence of solid solution strengthened alloys: Application to AA5754-0, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 75, Pages: 226-243, ISSN: 0749-6419
- Author Web Link
- Cite
- Citations: 31
Jeong Y, Pham MS, Iadicola M, et al., 2015, Forming limit diagram predictions using a self-consistent crystal plasticity model: A parametric study, Key Engineering Materials, Vol: 651-653, Pages: 193-198, ISSN: 1013-9826
A numerical model to predict forming limit diagrams (FLD) for polycrystalline metal sheets is presented. In it, the Marciniak-Kuczyński (MK) approach [1] is incorporated into the framework of the viscoplastic self-consistent (VPSC) crystal plasticity model [2]. The current model, dubbed the VPSC-FLD, can run simulations along individual loading paths in parallel, which can make use of a CPU-cluster to enhance the computational speed. The main objective of the current work is to provide a detailed sensitivity report based on the VPSC-FLD. First of all, the influence of the initial inhomogeneity, f, as defined in the MK approach, is illustrated. Secondly, FLDs resulting from various sizes of the statistical population for the crystallographic texture are examined. Lastly, the computation time spent for various sizes of the statistical population is given.
Pham M-S, Rollett AD, Creuziger A, et al., 2014, Constitutive Modeling based on Evolutionary Multi-junctions of Dislocations, MATERIAL FORMING ESAFORM 2014, Vol: 611-612, Pages: 1771-1776, ISSN: 1013-9826
Pham M-S, Holdsworth SR, 2014, Evolution of Relationships Between Dislocation Microstructures and Internal Stresses of AISI 316L During Cyclic Loading at 293 K and 573 K (20 °C and 300 °C), METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, Vol: 45A, Pages: 738-751, ISSN: 1073-5623
- Author Web Link
- Cite
- Citations: 49
Facheris G, Pham M-S, Janssens KGF, et al., 2013, Microscopic analysis of the influence of ratcheting on the evolution of dislocation structures observed in AISI 316L stainless steel during low cycle fatigue, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 587, Pages: 1-11, ISSN: 0921-5093
- Author Web Link
- Cite
- Citations: 27
Pham MS, Holdsworth SR, Janssens KGF, et al., 2013, Cyclic deformation response of AISI 316L at room temperature: Mechanical behaviour, microstructural evolution, physically-based evolutionary constitutive modelling, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 47, Pages: 143-164, ISSN: 0749-6419
- Author Web Link
- Cite
- Citations: 120
Pham MS, Holdsworth SR, 2013, Role of microstructural condition on fatigue damage development of AISI 316L at 20 and 300°C, INTERNATIONAL JOURNAL OF FATIGUE, Vol: 51, Pages: 36-48, ISSN: 0142-1123
- Author Web Link
- Cite
- Citations: 44
Minh-Son P, Hu L, Iadicola M, et al., 2013, The Strain Path Dependence of Plastic Deformation Response of AA5754: Experiment and Modeling, 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (NUMISHEET), Publisher: AMER INST PHYSICS, Pages: 500-503, ISSN: 0094-243X
Pham MS, Holdsworth SR, 2012, Dynamic strain ageing of AISI 316L during cyclic loading at 300 °C: Mechanism, evolution, and its effects, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 556, Pages: 122-133, ISSN: 0921-5093
- Author Web Link
- Cite
- Citations: 83
Pham MS, Solenthaler C, Janssens KGF, et al., 2011, Dislocation structure evolution and its effects on cyclic deformation response of AISI 316L stainless steel, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 528, Pages: 3261-3269, ISSN: 0921-5093
- Author Web Link
- Cite
- Citations: 152
Pham MS, Holdsworth SR, 2011, Change of stress-strain hysteresis loop and its links with microstructural evolution in AISI 316L during cyclic loading, 11th International Conference on the Mechanical Behavior of Materials (ICM), Publisher: ELSEVIER SCIENCE BV, Pages: 1069-1074, ISSN: 1877-7058
- Author Web Link
- Cite
- Citations: 11
Holdsworth SR, Mayer T, Pham MS, et al., 2010, The effect of sub-grain formation and development on cyclic response in engineering steels
A series of elevated temperature strain-controlled low cycle fatigue (LCFtests has been performed on two steels, one which cyclic softens (2CrMoNiWV one which both hardens and softens during its lifetime (17Cr12Ni2Mo. Multi-specimen tests have been conducted at specific conditions of temperature, strain rate and strain amplitude. In addition to the determination of crack initiation endurance, tests have been taken to, and discontinued at, various life fractions to provide samples for TEM, EBSD and SEM-BSE microstructural examination. The development of sub-grain microstructures ultimately controls the way in which both steels respond to strain-controlled cyclic plastic loading, but in very different ways. In the case of the 2CrMoNiWV steel at 565°C, continuous cyclic softening from the first load reversal is the consequence of progressive dynamic recovery and sub-grain growth. The more complex cyclic hardening/softening response of 17Cr12Ni2Mo steel at room temperature is a result of the development first of vein and channel/wall structures which are subsequently broken down into sub-grains of progressively reducing size by cross-slip.
Pham MS, Park K-W, Yoo B-G, et al., 2009, Plasticity Improvement of Amorphous Alloy via Skim Cold Rolling, METALS AND MATERIALS INTERNATIONAL, Vol: 15, Pages: 209-214, ISSN: 1598-9623
- Author Web Link
- Cite
- Citations: 12
Ramer R, Banciu MG, Dimitriu E, et al., Design and fabrication preamble of a microstrip HTS antenna, INDUSTRIAL CERAMICS, Vol: 21, Pages: 111-113, ISSN: 1121-7588
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.