Article
Mechanics
P. Fernandez-Pison, J. A. Rodriguez-Martinez, E. Garcia-Tabares, I Aviles-Santillana, S. Sgobba
Summary: This paper characterizes the microstructural evolution, plastic flow, and fracture behaviors of AISI 304L and AISI 316LN stainless steels at extremely low temperatures. It demonstrates that the martensitic transformation in AISI 304L occurs faster and to a greater extent than in AISI 316LN at both 77 K and 4 K. Additionally, experimental results reveal that AISI 316LN displays higher fracture toughness than AISI 304L.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Nanoscience & Nanotechnology
Liyang Zeng, Xiangyu Song, Nailu Chen, Yonghua Rong, Xunwei Zuo, Na Min
Summary: This study investigates the TRIP effect in austenitic steels by simulating experiments and using microstructural characterization methods. The results show that different types of martensitic transformations are associated with changes in SHR at different stages of deformation, and the contribution of DAMAI effect on SHR is greater than that of SIMT effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
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
Amir Baghdadchi, Vahid A. Hosseini, Leif Karlsson
Summary: This study focused on phase identification and quantification in transformation induced plasticity duplex stainless steel (TDSS) base and weld metal using light optical microscopy (LOM) and electron backscatter diffraction (EBSD) analysis, with a novel methodology introduced for multiphase materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
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
Metallurgy & Metallurgical Engineering
Tulani W. Mukarati, Roelf J. Mostert, Charles W. Siyasiya
Summary: This study investigates the mechanical properties of a lean AISI 301LN austenitic stainless steel under various temperature and strain conditions, revealing the influence of martensite transformation strengthening on the material's behavior. Various measurement techniques are used to accurately describe the kinetics of strain-induced martensite transformation at different temperatures, providing insights into the alloy's performance at different operating conditions.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Kazuyuki Shimizu, Hanako Tsuruta, Yasuhiro Kamada, Takeshi Murakami, Hideo Watanabe
Summary: This study investigated the mechanism of Ga+ irradiation-induced phase transformation of an austenitic stainless steel. The results showed that increasing irradiation dose led to an increase in the formation of the irradiation-induced bcc phase on the specimen surface. The orientation of the irradiation and crystallographic relationships also affected the transformation behavior.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
J. Hure, A. Courcelle, I. Turque
Summary: Swelling is commonly observed in austenitic stainless steels irradiated at high doses and high temperatures, and it can lead to macroscopic embrittlement. This study presents an experimental database and theoretical analysis to investigate the fatigue mechanisms induced by swelling and the effects of structural factors. The results provide insights into the mechanical perspective of swelling-induced embrittlement.
JOURNAL OF NUCLEAR MATERIALS
(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
Shing-Hoa Wang, Wuan-Yun Hsiao, Yo-Lun Yang, Chih-Yuan Chen, Jer-Ren Yang, Woei-Shyan Lee, Chien-Chon Chen, Po-Kai Chiu
Summary: The mechanical properties and microstructures of stainless steels are strongly influenced by the impact loading rate, with different deformation structures observed in different phases at varying strain rates.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
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
Materials Science, Multidisciplinary
J. Tabin, K. Nalepka, J. Kawalko, A. Brodecki, P. Bala, Z. Kowalewski
Summary: A remarkable plastic flow instability is observed during tensile deformation of the commercial 304 stainless-steel sheet at room temperature. The occurrence of plastic flow instability in 304 is dependent on the strain rate and specimen gage length. Moreover, the enhanced strain hardening resulting from deformation-induced martensitic transformation facilitates the orderly propagation of the strain-localized band.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Kyung-Shik Kim, Jee-Hyun Kang, Sung-Joon Kim
Summary: The simultaneous alloying of carbon and nitrogen did not decrease hydrogen diffusivity significantly in austenitic steel. During tensile straining, cracks initiated at grain boundaries and propagated along grain boundaries, twin boundaries, or paths where epsilon martensite was concentrated, resulting in mixed intergranular and transgranular fracture modes. However, the resistance to hydrogen embrittlement improved compared to single alloying of either carbon or nitrogen due to enhanced austenite stability.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Hongzhuang Zhang, Mengtao Xu, Zhendong Liu, Changyou Li, Yimin Zhang
Summary: The stored energy induced by SLM process and cyclic strain during fatigue testing can trigger grain boundary migration and local recrystallization behavior, impacting the fatigue performance of stainless steel. Understanding the role of local recrystallization in fatigue failure mechanisms of additively manufactured materials is essential for further research and development in this field.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
G. Venkata Sarath Kumar, K. Sivaprasad
Summary: Cryorolling followed by flash annealing has shown great potential for modifying the mechanical properties of face centered cubic alloys. This study compares the mechanical properties and deformation behavior of low nickel 304 stainless steel and high nickel 310 stainless steel. The strengthening mechanisms vary with the change in stacking fault energy (SFE), resulting in the formation of deformation-induced martensite and nanotwins. The dislocation density changes during rolling but recovers after flash annealing. Additionally, cryorolling partially converts deformation-induced martensite to austenite in 304 stainless steel, while flash annealing produces nano grains and a bimodal structure in 310 stainless steel.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Fereshte Ghorbani, Hamed Mirzadeh, Changiz Dehghanian, Massoud Emamy
Summary: The mechanical properties and in vitro corrosion behavior of Mg-0.5Zr-0.5Ca-xZn alloys in a simulated body fluid solution were investigated. The addition of zinc led to grain refinement and the formation of specific compounds. The alloy with 1 wt% Zn exhibited improved mechanical properties and corrosion behavior, while higher Zn additions resulted in deterioration of properties and increased microgalvanic couples. The grain refinement induced by thermomechanical processing improved mechanical properties but increased corrosion behavior.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Civil
Reza Motallebi, Hamed Mirzadeh
Summary: A simple heat treatment method was proposed to obtain ferritic-bainitic/martensitic dual-phase (DP) microstructure in low-carbon steel. The processed bainite-aided DP steel exhibited unexpectedly high strength and ductility.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Zeinab Savaedi, Reza Motallebi, Hamed Mirzadeh, Rouhollah Mehdinavaz Aghdam, Reza Mahmudi
Summary: This overview article reviews the superplastic behavior of medical magnesium alloys. It discusses the basics of superplasticity and superplastic forming via grain boundary sliding (GBS). The properties of biomedical Mg alloys are tabulated. The critical discussion focuses on the superplasticity of biocompatible Mg-Al, Mg-Zn, Mg-Li, and Mg-RE alloys, emphasizing the influence of grain size, hot deformation temperature, and strain rate on tensile ductility.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Hamed Mirzadeh
Summary: This monograph provides an overview of friction stir processing (FSP) of surface metal-matrix composites (MMCs) using AZ91 magnesium alloy, summarizing the results related to various reinforcing particles and explaining the AZ91 composite fabricating methods based on FSP. The effects of introducing second-phase particles and FSP process parameters on the microstructural modification, mechanical properties, wear/tribological behavior, and corrosion resistance are discussed. Furthermore, suggestions for future work, such as focusing on superplasticity, metal additive manufacturing processes, and common reinforcing phases, are proposed.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sajad Ghaemifar, Hamed Mirzadeh
Summary: The dissolution kinetics of the undesirable Laves phase in Inconel 718 was investigated through homogenization heat treatment. The activation energy and kinetic characteristics of Laves phase dissolution were determined, and the diffusion of Nb in Ni was identified as the key mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Milad Maleki, Susanne Berndorf, Sara Mohammadzehi, Hamed Mirzadeh, Massoud Emamy, Madlen Ullmann, Ulrich Prahl
Summary: The high strength Mg-4Zn-0.5Ca-0.5RE magnesium alloy was subjected to different hot deformation processes to refine its grain structure and enhance its mechanical properties. The extrusion process resulted in a dynamically recrystallized microstructure which improved the mechanical properties compared to the as-cast counterpart, while the forging process led to a partially recrystallized microstructure, indicating the need for high strains. The combination of extrusion and forging was found to be effective in achieving more intense grain refinement and improved strength without sacrificing ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Zeinab Savaedi, Hamed Mirzadeh, Rouhollah Mehdinavaz Aghdam, Reza Mahmudi
Summary: Shear punch testing was used to evaluate the superplasticity of a hot rolled fine-grained Mg-3Zn-0.5RE-0.5Zr (ZEK300) alloy. The alloy exhibited regions I, II, and III of deformation behavior typical of superplastic materials, with a grain size of 4.5 μm. In region II, the strain rate sensitivity indices of the ZEK300 alloy were determined to be 0.51, 0.48, and 0.41 at temperatures of 350, 400, and 450 degrees C, respectively. The average activation energy of 87.6 kJ mol-1 suggests that grain boundary sliding (GBS) facilitated by grain boundary diffusion is the dominant deformation mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Reza Zamani, Hamed Mirzadeh, Mehdi Malekan
Summary: The potentials of artificial neural network (ANN) modelling for investigating the hot deformation behaviour of high-entropy alloys and multi-principal element alloys during thermomechanical processing are assessed. ANN accurately predicts the flow stress and can generate a significantly larger output dataset compared to limited experimental data, providing valuable insights for understanding microstructural mechanisms and obtaining hot working parameters.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Aria Afsharnaderi, Mehrab Lotfpour, Ahmad Bahmani, Hamed Mirzadeh, Mehdi Malekan, Massoud Emamy, Mojtaba Fatehi Mollayousef, Soraya Bornay Zonoozi
Summary: The synergetic effect of strontium (Sr) and rare earth elements (RE) on the corrosion properties of as-cast Mg-9Al-1Zn alloy were investigated. The addition of 0.5 wt-% RE and 0.5 wt-% Sr (RE/Sr ratio of 1) significantly reduced the corrosion rate of AZ91. This was attributed to the modification of the β-Mg17Al12 phase and the formation of proper amounts of Al11RE3 and Al4Sr intermetallics, which minimized the micro-galvanic corrosion. However, an excessive RE/Sr ratio impaired the corrosion resistance, possibly due to the excess amounts of Al11RE3 and Al4Sr intermetallics causing micro-galvanic effect.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Javad Rezaei, Mohammad Habibi Parsa, Hamed Mirzadeh
Summary: The effects of heating temperature, heating rate, and holding time on the austenitization process of near-eutectoid high-carbon steel were investigated. Experimental tests and simulations were conducted to understand the variations of relevant parameters and the underlying reasons for different phase transformation mechanisms. A continuous heating transformation diagram was drawn to consider the influence of heating rate on the austenitization process and austenite grain size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Javad Sohrabi, Hamed Mirzadeh, Abdol Reza Geranmayeh, Reza Mahmudi
Summary: The effect of grain size on the mechanical properties of a high-entropy alloy was investigated through shear punch testing and Vickers hardness measurements. The dependency of shear yield stress and tensile yield stress on average grain size was observed, and corresponding Hall-Petch relationships were established. Additionally, the correlation between tensile test properties and those predicted by shear punch testing was studied.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sajad Ghaemifar, Hamed Mirzadeh
Summary: Shear punch testing was used for the first time to study the effect of post heat-treatment on the mechanical properties of additively manufactured Inconel 718 superalloy. The results showed that aging from the as-built condition led to better shear properties due to the high dislocation density and more homogeneously dispersed precipitates. A relationship between shear and tensile properties was established, allowing for estimation of one from the other.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Hamed Mirzadeh
Summary: This review paper focuses on the grain refinement and dynamic recrystallization (DRX) of Mg alloys during hot working. The grain refinement methods for Mg alloys, including solidification, fusion-based and solid-state metal additive manufacturing, annealing, and severe plastic deformation, are overviewed. The critical conditions, flow behaviors, microstructural evolution, and necklace formation during DRX in Mg alloys are summarized. The dependency of DRX grain size and its kinetics on deformation conditions, initial microstructure, alloying elements, dynamic precipitation, and particle stimulated nucleation are critically discussed. Furthermore, metadynamic recrystallization and the improvement of mechanical properties, such as strength-ductility synergy and superplasticity, are overviewed. Research gaps and future suggestions are also introduced.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sajad Ghaemifar, Hamed Mirzadeh
Summary: The high cooling rate in laser powder bed fusion (L-PBF) additive manufacturing can suppress the formation of niobium carbide (NbC) phase in Inconel 718 nickel-based superalloy parts. However, the NbC phase may precipitate during elevated temperature exposure. This study investigates the precipitation kinetics of NbC carbide during homogenization heat treatment and finds that increasing the homogenization temperature accelerates its formation. The diffusion of C and Nb atoms in the Ni matrix is identified as the underlying mechanism for NbC carbide formation during homogenization heat treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sajad Ghaemifar, Hamed Mirzadeh
Summary: In this study, the effects of direct aging treatment on Inconel 718 superalloy manufactured by selective laser melting were systematically investigated. It was found that direct aging can achieve peak aged condition at shorter holding times compared to aging after heat treatment. The precipitation kinetics of gamma '' phase were analyzed using hardness measurements and microstructural analysis, which provided consistent results for the activation energy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.