Article
Engineering, Civil
TaeSoo Kim, SeongKyu Hong, BoKyung Hwang, JunSu Kim
Summary: This study aimed to validate the effectiveness of double-shear bolted connections fabricated with lean duplex stainless steel in ultimate strength and fracture mode, investigating the influence of parameters such as extended end distances and edge distances, and recommending a modified block shear strength equation.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
C. Meena, V. Uthaisangsuk
Summary: This study investigated the effects of sigma phase on the mechanical characteristics of DSS grade SAF 2507 using a micromechanics based FE approach, revealing a good description of local failure behaviors on deformed samples. Through a combination of tests and simulations, the impact of sigma phase on DSS was well understood and validated.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Mohammad Saleh Geshani, Hamed Mirzadeh, Mohammad Javad Sohrabi
Summary: The grain size of duplex 2205 stainless steel is controlled through cold rolling and annealing, achieving grain refinement and grain coarsening via primary recrystallization and grain growth. The study proposes simple equations relating yield stress and ultimate tensile strength to grain size and relative volume fractions of ferrite and austenite. The research outcomes contribute to controlling the microstructure and mechanical properties of duplex stainless steels.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Darshan Chalapathi, P. V. Sivaprasad, Guocai Chai, Anand K. Kanjarla
Summary: This study explores the anisotropic evolution of duplex stainless steels through uni-axial testing in multiple macroscopic directions and crystal plasticity simulations. The results show that samples loaded in the transverse direction exhibit higher compressive stress and work hardening. Austenite and ferrite develop specific fiber textures during uni-axial compression. Plastic anisotropy evolution is influenced by the strong ferrite texture, while the weak austenite texture behaves similarly to its single-phase counterparts.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jing-kun Li, Bin-guo Fu, Tian-shun Dong, Guo-lu Li, Wen-qing Sheng, Yong-yue Liu, Jia-geng Liu
Summary: The effect of cold rolling reduction on the precipitation of a phase at 800°C in the 2906 DSS was investigated. Increasing the rolling reduction promotes the diffusion of Cr, Ni, and Mo elements, resulting in an increased precipitation rate of the a phase. The a phase prefers to nucleate around narrow ferrite regions and becomes coarser and continuous along the ferrite/austenite interface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
S. Janakiram, P. Sudharshan Phani, Govind Ummethala, Sairam K. Malladi, J. Gautam, Leo A. Kestens
Summary: This study investigates the structure-property correlations at the micrometer length scale during recovery and early recrystallization of a cold rolled high strength steel composed of ferrite and pearlite. High resolution nano-indention mapping technique and electron microscopy were used to study the local microstructure and hardness variations with annealing temperature. A clustering algorithm was employed to determine the properties of the constituent microstructural features.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Hossein Besharatloo, Jeffrey M. Wheeler
Summary: The development of high-speed nanoindentation has allowed for the acquisition of rich mechanical property data in a short amount of time, but the influences of indentation size and deconvolution method on phase properties remain unclear. By exploring different depth/spacing increments on two materials systems and comparing various statistical analyses, this study reveals the different sensitivities of deconvolution methods to errors in phase identification.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Ceramics
S. Gordon, H. Besharatloo, J. M. Wheeler, T. Rodriguez-Suarez, J. J. Roa, E. Jimenez-Pique, L. Llanes
Summary: High-speed nanoindentation is used to evaluate the micromechanical properties of polycrystalline cubic boron nitride and correlate them with the microstructure for performance optimization. The obtained mechanical maps and data sets are statistically treated using 1D and 2D Gaussian fitting. The technique is reliable for assessing intrinsic mechanical properties and mirroring microstructural assemblage, although challenges and disparities exist for fine-grained microstructures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Yongjian Fang, Min-Kyeom Kim, Yali Zhang, Taehwan Kim, Jonghwan No, Jonghwan Suhr
Summary: The employment of grain refinement approaches, such as laser powder bed fusion (LPBF) and subsequent quenching process, has been successfully developed to increase the mechanical properties of duplex stainless steels (DSSs). This study provides a groundwork for designing grain refinement methods to produce high-performance DSS parts with complex geometry based on LPBF technique.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Construction & Building Technology
Natalie Stranghoener, Christoph Abraham
Summary: The research project evaluated the load bearing behavior of stainless steel bolts under shear and tension through experiments and literature review, proposing new shear coefficients α for a more economical design.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Jie Chen, Chuang Liu, Kewei Dong, Shuai Guan, Qipeng Wang, Xianfeng Zhang, Yong Peng, Jian Kong, Kehong Wang
Summary: This study investigates the anisotropy in dynamic compressive deformation of 316L stainless steel fabricated by the wire and arc additive manufacturing process (WAAM). It is found that the <111> samples exhibit higher dynamic flow stresses due to lower density of deformation twins. The anisotropy of resistance to adiabatic shearing is observed, with the order of <100>, <110>, <112>, and <111>. Micro-texture discrepancy from adiabatic shear bands (ASB) is attributed to the precondition change of macro texture in the matrix.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Youngchai Lee, Jae Hee Lee, Joonoh Moon, Tae-Ho Lee, Changhee Lee
Summary: This study investigated the effect of austenite and ferrite phases on the mechanical properties and corrosion resistance of duplex stainless steel weld metals by substituting Ni with Mn, N, and Mn+N. The results showed that maintaining a 50:50 ratio of austenite and ferrite without harmful phases is crucial for performance, while excessive Mn can decrease corrosion resistance. Additionally, replacing Ni with Mn or N can lead to harder austenite, affecting the overall mechanical properties of the weld metal.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Physics, Applied
F. Marlow, S. Josten, S. Leiting
Summary: The work functions of different stainless steels were investigated, ranging from 4.08 to 4.19 eV. These work functions characterize the passive layer on top of the stainless steel bulk material, which confers corrosion resistance and controls electronic and electrochemical applications. Structured measurements of these materials are particularly important for applications such as solar cells or fuel cells. Surprisingly, composition changes in the stainless steel have a minimal effect on the work function, possibly due to a consistent number of d electrons responsible for the electronic band structure.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Dae Geon Lee, Ji Hoon Kim, Seong Hoon Kim, Heon Young Ha, Tae Ho Lee, Joonoh Moon, Dong-Woo Suh
Summary: We investigated the behavior of hydrogen and its effect on mechanical properties in duplex stainless steel under different charging conditions. In the ex-situ condition, hydrogen uptake increased linearly with charging time, with trapping mainly occurring at dislocations and grain boundaries in the ferrite phase. However, with prolonged charging time, trapping also occurred at the ferrite-austenite interface. In the in-situ condition, hydrogen uptake was accelerated and penetration into the steel interior was deeper, which was attributed to transport through gliding dislocations. The loss of elongation in the duplex stainless steel became less sensitive to hydrogen content as charging time increased, indicating a remarkable resistance to hydrogen embrittlement compared to conventional high strength steels.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Javier Varillas, Giovanni Ciccotti, Jorge Alcala, Lamberto Rondoni
Summary: Mathematical relations concerning particle systems require applicability conditions. The Jarzynski equality, a mechanical theory, shows surprising generality in determining free-energy variations for non-equilibrium processes. However, it can be process-dependent and its verification may be challenging.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Materials Science, Ceramics
H. Besharatloo, M. de Nicolas-Morillas, M. Chen, A. Mateo, B. Ferrari, E. Gordo, E. Jimenez-Pique, J. M. Wheeler, L. Llanes
Summary: The influence of microstructure and processing route on the mechanical response, deformation, and failure mechanisms of Ti(C,N)-FeNi cermets were investigated by compressing micropillars milled by focused ion beam. Stress-strain curves and deformation mechanisms were observed using scanning electron microscopy. The appropriate micro-pillar size was determined based on the microstructural characteristics to overcome scale effect issues. The results showed a direct relationship between yield strength and ceramic/metal ratio for colloidal samples, and deformation of metallic binder and glide between Ti(C,N)/Ti(C,N) particles were dominant mechanisms during compression.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
S. Gordon, H. Besharatloo, J. M. Wheeler, T. Rodriguez-Suarez, J. J. Roa, E. Jimenez-Pique, L. Llanes
Summary: High-speed nanoindentation is used to evaluate the micromechanical properties of polycrystalline cubic boron nitride and correlate them with the microstructure for performance optimization. The obtained mechanical maps and data sets are statistically treated using 1D and 2D Gaussian fitting. The technique is reliable for assessing intrinsic mechanical properties and mirroring microstructural assemblage, although challenges and disparities exist for fine-grained microstructures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Junhui Zhang, Maziar Ahmadi, Marc Serra, Emilio Jimenez-Pique, Luis Llanes, Gemma Fargas
Summary: There is a growing interest in zirconia ceramics due to their high flexural strength, excellent corrosion resistance, and good biocompatibility. The assembly of advanced zirconia material with functions of sensing, actuation, and controlling is critical to ensure long-term service and performance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Jairo Alberto Munoz, Egor Dolgach, Vanina Tartalini, Pablo Risso, Martina Avalos, Raul Bolmaro, Jose Maria Cabrera
Summary: This research investigates the microstructural and mechanical changes in the welded seam of an austenitic stainless steel tube. The fusion zone experiences the greatest decrease in hardness, followed by the heat-affected zone and the base material. The welding process results in a dendritic structure in the fusion zone and varying austenitic grain sizes from the heat-affected zone to the base material. The mechanical behavior of the seam is influenced by the size of austenite grains, with the larger grains in the fusion zone leading to lower strength and ductility.
Article
Nanoscience & Nanotechnology
Marcos Natan da Silva Lima, Guilherme Luis Franca Schmalz, Rodrigo de Carvalho Paes Loureiro, Joao Carlos Ferreira, Samuel Filgueiras Rodrigues, Jessica Calvo Munoz, Jose Maria Cabrera Marrero, Hamilton Ferreira Gomes de Abreu
Summary: An experimental TWIP steel was deformed under hot torsion tests at different total equivalent strains. The effects of torsional deformation on the microstructure, texture, and mechanical properties were investigated. It was found that the main deformation mechanism changed from conventional sliding to nucleated twinning. The best balance between strength and ductility was achieved after a total equivalent strain of 2.6.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Rezayat, Amirhossein Aboutorabi Sani, Mohammad Talafi Noghani, Morteza Saghafi Yazdi, Morteza Taheri, Amirhossein Moghanian, Mohammad Abedini Mohammadi, Mahmoud Moradi, Antonio Manuel Mateo Garcia, Hossein Besharatloo
Summary: The aim of this study was to evaluate the corrosion properties of different samples coated by the laser-cladding method and find the optimal laser parameters. Potentiodynamic polarization (Tafel) and electrochemical impedance tests were performed to assess the corrosion resistance. Scanning electron microscopy was used to inspect the corrosion morphology of the tested samples. The results showed a direct correlation between laser power and pitting corrosion on the surface of the samples. Additionally, an increase in molybdenum and chromium ions in the electrolyte solution led to more durable passive and protective layers, as the ions filled the holes and defects, reducing the surface corrosion rate.
Article
Materials Science, Multidisciplinary
Marcos Natan da Silva Lima, Samuel Filgueiras Rodrigues, Majid Al-Maharbi, Jessica Calvo Munoz, Jose Maria Cabrera Marrero, Hamilton Ferreira Gomes de Abreu
Summary: The development of microstructure and texture of TWIP steel sheet during ECAP at different temperatures were studied, and the effect of temperature during the severe plastic deformation process was compared. The results showed that the volume fraction of twins, dislocation density, and yield strength increased while ductility decreased after ECAP. The best balance between high strength and good ductility was achieved after four passes at 250 degrees C and 350 degrees C.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Zhixin Zeng, Yuan Xiao, Jeffrey M. M. Wheeler, Jin-Chong Tan
Summary: Understanding the mechanical behavior of MOF beyond their elastic limit is crucial for their practical applications. The study determined the stress-strain curves of a copper paddlewheel MOF (HKUST-1) along different crystallographic directions and revealed anisotropic elastic response and extensive plastic flows. The fracture toughness values of two facets were comparable, indicating the ductility of porous framework under compression and bonds breakage.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Jing Liang, Marc Serra, Sandra Gordon, Jonathan Fernandez de Ara, Eluxka Almandoz, Luis Llanes, Emilio Jimenez-Pique
Summary: The objective of this study is to explore and compare the mechanical response of AlCrSiN coatings deposited on two different substrates, namely, WC-Co and cBN. The AlCrSiN coating deposited on the WC-Co substrate performed better in terms of adhesion strength and contact damage response than the same coating deposited on the cBN substrate due to the lower plasticity of the cBN substrate and its weaker adhesion to the coating.
CERAMICS-SWITZERLAND
(2023)
Review
Materials Science, Multidisciplinary
Mohammad Rezayat, Mojtaba Karamimoghadam, Mahmoud Moradi, Giuseppe Casalino, Joan Josep Roa Rovira, Antonio Mateo
Summary: This paper provides a review of various surface treatment methodologies, especially laser treatments, used to improve the mechanical properties of metastable austenitic stainless steels (MASS). The effects of these treatments on the microstructure and chemical composition in the thermal affected zone of MASS are discussed, and their impact on the material's mechanical properties is investigated in detail. The limitations of these treatments are highlighted, and areas for further research are identified. The findings can be used to guide the selection of appropriate surface treatment techniques, ultimately improving the performance and lifespan of MASS in industrial applications.
Article
Materials Science, Multidisciplinary
Ming Chen, Alla S. Sologubenko, Jeffrey M. Wheeler
Summary: In this study, plasticity in single crystalline Ge over a wide temperature range, even at cryogenic temperatures, was demonstrated through in situ compression of micron-sized specimens. The size and temperature dependent plasticity was investigated, providing comprehensive knowledge for the fundamental understanding of plasticity and defect behavior in covalent semiconductors and practical guidelines for the fabrication of robust Ge-based microstructures for device applications.
Article
Materials Science, Multidisciplinary
Hiba Azzeddine, Salaheddine Sadi, Abdelkader Hanna, Thierry Baudin, Francois Brisset, Jose Maria Cabrera
Summary: In this study, the grain growth activation energy of Mg-0.3Ce alloy after ECAP processing was evaluated. The results revealed a strong dependence of grain growth activation energy on the deformation processing. The sample ECAP-processed at 350°C exhibited two different values of grain growth activation energy, attributed to the deformation microstructure and dynamic grain growth during ECAP processing at 350°C.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
C. E. Coronado-Alba, I. Mejia, J. M. Cabrera
Summary: The excellent combination of tensile strength and elongation of low-density steels has attracted great interest in the metallurgical field. The need to understand the effects of welding processes has led to increased studies on the weldability of these steels. This research work focuses on studying the microstructural and mechanical behavior of the fusion zone and heat-affected zones of LD steels welded through an autogenous GTAW process. Results indicate significant variations in the microhardness profile of the welded joint, particularly in the heat-affected zones.
MATERIALS TODAY COMMUNICATIONS
(2023)
