Article
Nanoscience & Nanotechnology
C. Teena Mouni, J. Christopher, S. Mahadevan, C. Ravishankar, Shaju K. Albert
Summary: This study investigates the ambient temperature uniaxial tensile deformation behavior of 304 stainless steel using a physics-based model. The results show that the initial microstructure of the steel plays a significant role in the accumulation and annihilation rates of dislocations as well as the load distribution between the austenite and martensite phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Matthias Droste, Sebastian Henkel, Horst Biermann, Anja Weidner
Summary: This study investigates metastable austenitic stainless steel during fatigue tests under strain control and focuses on the influence of different microstructures on fatigue life. Additionally, a proposed approach for calculating parameters based on strain-controlled tests is introduced to estimate fatigue life for materials undergoing secondary hardening due to martensitic phase transformation.
Article
Materials Science, Multidisciplinary
Hanna Yang, Thanh Tuan Nguyen, Jaeyeong Park, Hyeong Min Heo, Junghoon Lee, Un Bong Baek, Young-Kook Lee
Summary: In this study, the resistance to hydrogen embrittlement of STS 304 austenitic stainless steel was investigated. The results showed that the resistance decreased with decreasing temperature and disappeared below -150 degrees C. The occurrence of hydrogen embrittlement at temperatures from 25 to -50 degrees C was attributed to strain-induced martensitic transformation and hydrogen diffusion into stress-concentrated regions.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Lei Chen, Qixiang Jia, Shuo Hao, Yongxin Wang, Cheng Peng, Xiaocong Ma, Zongyuan Zou, Miao Jin
Summary: The study focused on the influence of SIMT on strain distribution, kinetics, and microstructure, proposing a modified model to quantify SIMT kinetics. Experimental tests characterized the effects of SIMT on damage evolution, revealing that the overall fracture of LDSS exhibits ductile features.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Javad Mola, Guoqing Luan, Qiuliang Huang, Christiane Ullrich, Olena Volkova, Yuri Estrin
Summary: Discontinuous plastic flow due to dynamic strain aging in a Fe-13Cr-3.4Mn-0.47C metastable stainless steel was studied, with different mechanisms proposed for different temperature intervals. The study identified deformation-induced martensitic transformation and carbon diffusion as key processes in DSA at various temperatures.
Article
Nanoscience & Nanotechnology
Christina Schroeder, Olena Volkova, Marco Wendler
Summary: This research investigates the temperature dependent mechanical properties of two types of stainless steels and finds that increasing strain rate decreases the ultimate tensile strength but has minimal effect on the uniform elongation of 4Mn. Additionally, 4Mn has a higher fraction of strain-induced alpha'-martensite compared to 1.4310.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yaji Li, Jun Li, Jinyao Ma, Peide Han
Summary: The presence of silicon in metastable austenitic stainless steel (MASS) affects the strain-induced martensitic transformation during cold rolling. Higher silicon content leads to faster martensitic nucleation and more uniform distribution of martensite. It also increases the strain hardening rate of MASS. This finding is beneficial for the rolling of ultra-thin strip stainless steel.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Hui-yun Zhang, Liu-wei Zheng, Tao Wang, Wen-jie Lv, Quan-xin Shi, Jin-yao Ma, Yi Luo, Wei Liang, Jun Hu, R. D. K. Misra
Summary: The research found that in 304 austenitic stainless steel, hydrogen promotes the formation of alpha'-martensite, increases hydrogen diffusion depth, and hydrogen embrittlement sensitivity. Hydrogen is captured by the grain boundary, slightly reducing the material's hardness, but the role of hydrogen in reducing hardness cannot be overestimated.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
A. Zergani, H. Mirzadeh, R. Mahmudi
Summary: The study found a linear relationship between tensile and shear yield stresses in AISI 304L stainless steel, which agreed with von-Mises criterion. However, the ultimate shear and tensile strength values showed three distinct temperature-dependent regimes, possibly due to the influence of transformation-induced plasticity effect and dynamic strain aging phenomenon.
MATERIALS SCIENCE AND TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Xuebing Liu, Xinfang Zhang
Summary: The study revealed that in metastable austenitic stainless steel, the martensite reverse transformation behavior and microstructure differences have a significant impact on mechanical properties. Pulsed electric field treatment can promote the reverse transformation of martensite to austenite, leading to equiaxed, defect-free austenite grains with excellent ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
C. Teena Mouni, C. Ravishankar, S. K. Albert, Pradyumna Kumar Parida
Summary: The study compares room temperature tensile properties of type 304 stainless steel treated at different temperatures, with a focus on strain-induced martensite formation. By using magnetic measurements and microscopy, the kinetics of martensite formation in relation to prior deformation temperature and strain is examined.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Qiuliang Huang, Christiane Ullrich, Javad Mola, Mykhaylo Motylenko, Lutz Krueger, Olena Volkova, Andreas Weiss, Marco Wendler
Summary: This study presents a systematic investigation on the quenching and partitioning processing of a (C + N)-containing austenitic stainless steel and compares it with C-containing Q & P-treated stainless steels. The influence of partitioning conditions on the mechanical properties is analyzed. It is found that the mechanical properties depend on the interstitial partitioning between martensite and austenite, and the optimal mechanical properties are obtained after partitioning at 450°C for 3 minutes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Civil
Mohammad Javad Sohrabi, Hamed Mirzadeh, Saeed Sadeghpour, Abdol Reza Geranmayeh, Reza Mahmudi
Summary: The sequential TWIP and TRIP effects were induced in a commercial AISI 304L stainless steel by tailoring the average austenite grain size. Grains refinement promoted the TWIP effect, while grain coarsening enhanced the TRIP effect.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Metallurgy & Metallurgical Engineering
Devashish Vikas Wanjari, Awanikumar P. Patil, Sushil Kumar Singh, Inayat Ullah, Sourabh Shukla
Summary: The present study investigates the effects of strain-induced martensite and its reversal on metastable austenitic stainless steel through metallurgical and sensitisation analysis. The findings show that an increase in cold working results in higher sensitisation, but the recovery of SIM in austenite decreases sensitisation. This study provides important guidance for the fabrication of metal forming components.
ANTI-CORROSION METHODS AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Y. Jiang, X. Zhou, X. Y. Li, K. Lu
Summary: Grain boundary relaxation can stabilize nanograined structures in many FCC metals and alloys, but this mechanism is interfered by deformation-induced martensitic transformation in 304 stainless steels. In this study, gradient FCC nanograined structures were prepared in a 304 stainless steel and triggered GB relaxation was observed in samples with grain sizes below 60 nm. Thermal stability increased with decreasing grain size, contrary to the conventional trend. Martensitic nanograins of the same composition did not exhibit GB relaxation, as their instability temperature was controlled by reverse martensitic transformation.
Article
Materials Science, Ceramics
Ailar Hajimohammadi, Saeed Masoumi, Taehwan Kim, Eric McCaslin, Mohammed Fouad Alnahhal, Jonathan D. Almer, Claire E. White
Summary: Geopolymers, as an environmentally friendly alternative to cement, are gaining popularity in construction. The use of short fibers, such as carbon fiber, to improve the properties of geopolymers is a promising method. This study investigates the bonding mechanism between carbon fiber and metakaolin-based geopolymer matrix, revealing the existence of chemical bonding at the interfacial region.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Correction
Materials Science, Multidisciplinary
Yadunandan Das, Jianling Liu, Hossein Ehteshami, Joakim Odqvist, Niklas Hollander Pettersson, Sten Wessman, Stephen King, Peter Hedstrom
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alexander Dahlstrom, Frederic Danoix, Peter Hedstrom, Joakim Odqvist, Helena Zapolsky
Summary: The study found that the magnitude of stress and the crystallographic direction directly affect the development of spinodal decomposition and nanostructure morphology. The modulated nanostructure of binary bcc alloy system can be quantified by a characteristic wavelength λ. The effect of applied compressive and shear stress states differs from the effect of applied tensile stress regarding morphological anisotropy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhengchun Liu, Hemant Sharma, Jun-Sang Park, Peter Kenesei, Antonino Miceli, Jonathan Almer, Rajkumar Kettimuthu, Ian Foster
Summary: The deep-learning based method BraggNN can rapidly determine diffraction peak positions with higher accuracy compared to traditional pseudo-Voigt fitting. Experimental results show significant improvements in accuracy and computational speed when using BraggNN, showcasing its potential for real-time applications in X-ray diffraction microscopy techniques.
Article
Materials Science, Multidisciplinary
Sen Lin, Annika Borgenstam, Andreas Stark, Peter Hedstrom
Summary: The addition of silicon in steel affects the bainitic transformation kinetics, carbide formation, and dislocation density. Increasing silicon content leads to a slower bainitic transformation and incomplete transformation due to hindrance of carbide formation and accumulation of carbon at the migrating interface. The decrease in dislocation density does not have a significant impact on carbide formation or carbon diffusion.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Mechanical
Matthew Northam, Quentin Fouliard, Lin Rossmann, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Vaishak Viswanathan, Bryan Harder, Seetha Raghavan
Summary: The current standard application method for thermal barrier coatings (TBCs) on turbine blades for jet engines is electron-beam physical vapor deposition (EB-PVD). An emerging deposition method, plasma-spray physical vapor deposition (PS-PVD), offers a faster and less expensive alternative with a tailorable microstructure. By comparing lifetime behavior of both coatings, it was found that PS-PVD coatings showed greater variation in in-plane room temperature strain in the thermally grown oxide (TGO) layer after cycling, while both coatings exhibited similar high-temperature strain and no spallation after 600 thermal cycles. Microscopy imaging showed that PS-PVD coatings had more rumpling and different failure modes in the TGO layer compared to EB-PVD coatings. The tailorability of PS-PVD coatings enables adjustments to improve overall performance and bridge the differences between the two deposition methods.
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Materials Science, Multidisciplinary
Zhixing Wu, Penghui Ding, Viktor Gueskine, Robert Boyd, Eric Daniel Glowacki, Magnus Oden, Xavier Crispin, Magnus Berggren, Emma M. Bjork, Mikhail Vagin
Summary: Electrocatalysis plays a crucial role in achieving sustainable chemical production using abundant resources and renewable energy. In this study, we developed an effective electrochemical method for producing hydrogen peroxide (H2O2) using only pure water and oxygen. Nickel (II) oxide (NiO) was used as the electrocatalyst for oxygen evolution reaction (OER) at the anode, while a conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) drove the oxygen reduction reaction (ORR) at the cathode to generate H2O2. The conversion efficiency of the H2O2 electrochemical refinery was limited by unbalanced ionic transport in the solid electrolyte, but optimization of operation conditions achieved an efficiency of 80%.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Tun-Wei Hsu, Grzegorz Greczynski, Robert Boyd, Szilard Kolozsvari, Peter Polcik, Magnus Oden
Summary: Titanium tungsten carbide (TiWC) coatings were deposited using a combined high-power impulse and dc magnetron co-sputtering technique. The deposition phase involved heavy ion irradiation instead of external heating. The coating structures were established using titanium carbide targets in dc magnetron mode and tungsten carbide targets in high-power impulse mode. Varying the peak target current density (JT) controlled the intensity of W+ ion flux, which affected the film properties. The hybrid process resulted in dense TiWC coatings with a hardness above 30 GPa, comparable to films deposited using dc magnetron sputtering with external heating. The relative energy consumption was reduced by 77% compared to high-temperature dc magnetron sputtering.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Guanghui Yang, Jiyeon Kang, Amanda Carsbring, Wangzhong Mu, Peter Hedstrom, Jin-Kyung Kim, Joo Hyun Park
Summary: The precipitation of Cr-rich BCC particles was found to be dependent on the chemical composition of Fe-Cr-Ni medium entropy alloys. These particles played a significant role in the hardening of the alloys. The different precipitation behaviors at two temperatures resulted in variations in grain size distribution and hardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Erik Claesson, Hans Magnusson, Joachim Kohlbrecher, Mattias Thuvander, Peter Hedstrom
Summary: The evolution and precipitation behavior of iron carbides in low-alloy tool steel during tempering were investigated using neutron scattering and microscopy techniques. The composition of cementite changed and an enriched shell with substitutional elements was observed. Additionally, the precipitation of small non-magnetic particles was observed.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Thomas Kohne, Johan Fahlkrans, Albin Stormvinter, Emad Maawad, Aimo Winkelmann, Peter Hedstrom, Annika Borgenstam
Summary: The martensitic transformation in high-carbon steels with different cooling rates was studied through in situ and ex situ experiments. The results showed that the cooling rate and the steel's Ms had a significant impact on the transformation, affecting the tetragonality and phase fraction of martensite formed. Slower cooling rates resulted in a decrease in average tetragonality and a lower fraction of martensite at room temperature but an increase in autotempered martensite. The distribution of martensite tetragonality was found to be heterogeneous for all cooling rates.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Thomas Kohne, Johan Fahlkrans, Sven Haglund, Albin Stormvinter, Eva Troell, Peter Hedstrom, Annika Borgenstam
Summary: The impact of cooling rate during high-pressure gas quenching on the fatigue performance of low-pressure carburized spur gears was studied. The results show that a slower cooling rate can increase the fatigue limit and the slower cooled gears have higher compressive residual stresses compared to the faster cooled gears.
Article
Materials Science, Multidisciplinary
Tim Fischer, Carl F. O. Dahlberg, Peter Hedstrom
Summary: This paper investigates the cyclic deformation behavior in lath martensite-based high-strength steels using a crystal plasticity finite element method. It is found that both the Hutchinson and Chaboche-Cailletaud flow rules can accurately predict the local stress and strain distributions within the hierarchical martensitic microstructure. However, using the Hutchinson flow rule improves computational performance and leads to a re-distribution of the bimodal local stresses at a lower stress level when assuming plastic deformation on the {112}(111) slip system.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
J. Salamania, K. M. Calamba Kwick, D. G. Sangiovanni, F. Tasnadi, I. A. Abrikosov, L. Rogstrom, L. J. S. Johnson, M. Oden
Summary: The defect structures forming during high-temperature decomposition of Ti1-xAlxNy films were investigated through high-resolution scanning transmission electron microscopy. Two types of dislocations, misfit edge dislocations and a/6(112){111} partial dislocations, were found at the interface between TiN-rich and AlN-rich domains. The stacking fault energy associated with the partial dislocations decreases with increasing Al content, facilitating the phase transition of AlN-rich domains. Additionally, intersections of stacking faults were observed at the interface after annealing to 1100 degrees C, contributing to the hardening in Ti1-xAlxNy.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Peng Luo, Zhenduo Wu, Wentao Zhang, Sinan Liu, Si Lan, Jonathan D. Almer, Yang Ren, Xun-Li Wang, Weihua Wang
Summary: Studying the flow behavior of amorphous solids is crucial for understanding their deformation mechanism, but detecting basic flow events in these materials is challenging. Using simultaneous SAXS/WAXS experiments, researchers have identified elementary flow carriers in wound metallic glasses, with a radius of gyration ranging from 2.5 to 3.5 nm, based on flow-induced structural heterogeneities. The size of these carriers increases and their morphology changes from spherical to rod-like during flow. Additionally, the atomic structure undergoes an unusual change to a more disordered state during winding/annealing at a temperature around 0.8 Tg. This work provides an atomic-to-nanoscale description of flow carriers in amorphous solids during deformation.
MATERIALS RESEARCH LETTERS
(2023)