Article
Materials Science, Multidisciplinary
Jae-Yeon Kim, Ki-Tae Yoo, Jai-Won Byeon
Summary: In this study, the effects of discontinuous precipitate (DP) and continuous precipitate (CP) on the tensile elongation and fracture mechanism of aging-treated AZ91D Mg alloy were investigated. The increase in area fraction of DPs was found to cause a slight decrease in tensile elongation due to cracking along grain boundaries. Experimental results also showed that a large number of fine tension twins were produced within a few percent of tensile elongation for specimens with high CP/alpha-Mg interfaces per unit volume, leading to premature fracture.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Jun Wang, Mahmoud Reza Ghandehari Ferdowsi, Peter A. Lynch, Sitarama R. Kada, Matthew R. Barnett
Summary: This study investigates the effects of age hardening on different types of twinning in magnesium alloys, specifically in alloy Mg-6.5Zn with bimodal textures. It was found that tensile twinning is stimulated by precipitates while compression twinning is suppressed by them. This difference is attributed to lower twin surface energy and a larger twinning dislocation Burgers vector in compression twins.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Evgenii Vasilev, Marko Knezevic
Summary: Microstructural heterogeneities in coarse-grained Mg during plastic deformation play a significant role in damage formation and fracture behavior. Twining and voids formation are observed, with distinct effects on material softening and localization of deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Gukin Han, Yeonju Noh, Umer Masood Chaudry, Sung Hyuk Park, Kotiba Hamad, Tea-Sung Jun
Summary: The study found that Mg-0.5Ca alloy exhibits temperature-insensitive hardening behavior, while pronounced twinning activity was observed in pure Mg when deformed at low temperatures. The microstructure of Mg-0.5Ca helps reduce twinning behavior, resulting in its hardening behavior being temperature-dependent.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
T. Nakata, C. Xu, S. Kamado
Summary: After cold-rolling an Mg-6Zn-0.3Ca alloy sheet with a strong basal texture, anomalous double twinning occurred with the (0001) pole aligned to the transverse direction. These twins served as nucleation sites for statically recrystallized grains during annealing, resulting in weak texture features in the annealed sheet with transverse-direction split (0001) poles.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: We report the formation of an unusual texture on the sheet-surface of a rolled Mg-3Al-0.4Mn alloy, where a typical basal texture is formed at the center of the sheet and an unusual texture with vertical tiling is observed at the sheet-surface. The surface promotes prismatic slips and dynamic recrystallization, leading to a high fraction of fine basal-textured grains and a small fraction of off-basal-textured grains. In contrast, the center preserves a relatively high fraction of deformed grains, promoting the growth of basal-textured grains and the formation of the typical basal texture.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: This study investigates the origin of the unique parallel alignment of (0001) poles to the transverse direction in rolled alloy sheets. It is found that intermediate reheating during rolling facilitates static recrystallization and leads to the formation of the parallel alignment of (0001) poles to the transverse direction. In contrast, continuous rolling without intermediate reheating suppresses the formation of the unique alignment. The presence of severely deformed regions near double twins hinders the nucleation and growth of statically recrystallized grains, resulting in in-plane anisotropy in ductility.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Yoshikazu Nakai, Shoichi Kikuchi, Kaito Asayama, Hayata Yoshida
Summary: The research revealed that twinning occurs under compressive stress, while detwinning only happens under tensile stress. Compression-compression fatigue tests can lead to continuous twinning, changing grain orientation and causing crack formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhen Peng, Yi Liu, Lirong Xiao, Yue Yang, Bo Gao, Mengning Xu, Zhaohua Hu, Yandong Yu, Xuefei Chen, Hao Zhou
Summary: In this study, four typical twin-like interfaces were identified as incoherent grain boundaries. It was proposed that the interaction of multiple twinning contributes to the formation of these boundaries, and a special angle close to 90 degrees is formed due to alternative tensile and compression twinning under uniaxial loading.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Ning Xu, Pingli Mao, Le Zhou, Zhi Wang, Feng Wang, Zheng Liu, Qunjiao Wang
Summary: The effect of pre-strain on extension twinning behavior in an extruded AZ31 Mg alloy was investigated. It was found that pre-strain along the radial direction significantly hindered the nucleation of {1012} extension twins during subsequent compression. However, the growth of {101(over bar)2} extension twins was minimally affected. Twin-twin interaction at a twin boundary facilitated the nucleation of {101(over bar)2} extension twins. The increase in dislocation density in the twinned area was mainly attributed to basal slip inside twins rather than twin-dislocation interaction, with twin-twin interaction being an important source of dislocation multiplication.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Zhiquan Huang, Chuanlu Qi, Yanchun Zhu, Guowei Yang, Hongyu Lai, Jinchao Zou
Summary: The microtexture evolution of AZ31 magnesium alloy plate edge samples was studied using EBSD, revealing that the generation of extension twins is influenced by varying deformation conditions. At room temperature, the edge samples exhibited significantly greater texture strength than the middle part, with the consumption of hard-oriented grains and weakening effect of the basal texture being proportional to the volume fraction of extension twins.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Chunyu Wang, Yuxiu Zhang, Qinghuan Huo, Zhirou Zhang, Jiao Tang, Aki Hashimoto, Xuyue Yang
Summary: This study investigated the effects of twinning time node on the creep resistance of an extruded Mg-2wt%Y sheet. Pre-compression with a low strain before creep resulted in a large amount of {10 (1) over bar2} twins, impacting the creep resistance of the samples. The dominant creep mechanisms differed between samples with and without pre-compression, with the presence of twins affecting the creep rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xiaoxu Wu, Pingli Mao, Xuanyu Liu, E. Yuqing, Le Zhou, Zhi Wang, Feng Wang, Zheng Liu
Summary: The effects of volume fraction of pre-introduced {10-12} extension twins on the adiabatic shear sensitivity of AM30 magnesium alloys were studied. The results showed that the adiabatic shear sensitivity of the alloys increased with the increase in the volume fraction of twins, while the degree of recrystallization in the shear band decreased.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, C. Xu, K. Sugiya, Y. Yoshida, K. Yoshida, L. Geng, S. Kamado
Summary: An anomalous in-plane anisotropy was observed in a basal-textured Mg-Al-Zn alloy sheet due to the high activation of tensile twinning induced by a small fraction of transverse direction (TD)-oriented (0001) poles. This led to deteriorated tensile properties along the TD, emphasizing the importance of microtexture design for high-performance wrought magnesium.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jiaxiang Li, Qinghuan Huo, Chunyu Wang, Yuxiu Zhang, Zhirou Zhang, Gang Feng, Xuyue Yang
Summary: The results of the study demonstrated a clear tension-compression asymmetry in the creep behavior of the alloy under tensile and compressive creep loading along the rolling direction and the normal direction. Twinning played a role in deteriorating the creep resistance of certain samples and causing asymmetrical behavior in the results. The T-RD sample showed the best creep resistance, while the C-ND sample followed, with the C-RD and T-ND samples showing similarly poor creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Yangwei Wang, Ghulam Yasin, Faisal Nazeer, Abdul Malik, Tahir Ahmad, Waheed Qamar Khan, Tuan Anh Nguyen, Hao Zhang, Mohamed A. Afifi
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Yangwei Wang, Muhammad Junaid Anjum, Ghulam Yasin, Abdul Malik, Faisal Nazeer, Shahrukh Khan, Tahir Ahmad, Hao Zhang
Review
Metallurgy & Metallurgical Engineering
Abdul Malik, Yangwei Wang, Cheng Huanwu, Faisal Nazeer, Muhammad Abubaker Khan
Summary: Magnesium alloys are lightweight materials that have gained increasing attention in military and aerospace fields, but their applications are limited by low ductility and mechanical properties. Components made from magnesium alloys must withstand shockwaves under hypervelocity ballistic impact, and ballistic testing can provide valuable data for performance evaluation and optimization.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Abdul Malik, Yangwei Wang, Faisal Nazeer, Muhammad Abubaker Khan, Muhammad Sajid, Saeed Jamal, Wang Mingjun
Summary: The deformation behavior of an extruded Mg-Zn-Zr alloy in plate/sheet form was investigated, and it was found that the loading directions and initial texture significantly affected the flow stress and strain hardening rate, leading to differences in ultimate compressive and tensile strength. Anisotropy in the material was attributed to factors such as fine-grained size, twinning dependencies on strain path loading, and texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Mohammad Tabish, Muhammad Uzair Malik, Muhammad Abubaker Khan, Ghulam Yasin, Hafiz Muhammad Asif, Muhammad Junaid Anjum, Waheed Qamar Khan, Shumaila Ibraheem, Tuan Anh Nguyen, Y. Slimani, M. Tariq Nazir
Summary: Coatings of NiCo and NiCo/rGO were constructed onto Q235 carbon steel surface through an electrochemical co-deposition process, achieving good mechanical properties and corrosion resistance. The addition of rGO nanoplatelets resulted in enhanced mechanical properties, unique morphology, higher microhardness, and improved corrosion resistance compared to NiCo coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Abdul Malik, Yangwei Wang, Huanwu Cheng, Faisal Nazeer, Muhammad Abubaker Khan
Summary: The study investigated the post deformation and damage behavior of an extruded Mg-Zn-Zr alloy under a ballistic impact. Results showed that energy absorption was achieved through twinning induced recrystallization, and the top broad sides of the crater exhibited a change in texture from weak basal to strong prismatic. A revised model for the development of ultra-fine grains near the crater was proposed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Rashid Iqbal, Muhammad Bilal Akbar, Aziz Ahmad, Arshad Hussain, Naveed Altaf, Shumaila Ibraheem, Ghulam Yasin, Muhammad Abubaker Khan, Mohammad Tabish, Anuj Kumar, Muhammad K. Majeed, Adil Saleem, Sajjad Ali
Summary: The study demonstrates that incorporating bimetallic Ni and Fe into MOFs can achieve efficient electrocatalytic reduction of CO2 through synergistic effect with surrounded nitrogen atoms. Density functional theory calculations reveal that the combination of metals helps improve the Faradaic efficiency and maintain stability under a low applied potential.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Tabish, Muhammad Uzair Malik, Muhammad Abubaker Khan, Muhammad Junaid Anjum, Noor Muhammad, Arsalan Ahmad, Shumaila Ibraheem, Anuj Kumar, Tuan Anh Nguyen, Ghulam Yasin
Summary: In this study, a facile electroless codeposition process was used to fabricate a GPTMS/GO/FAS coating with excellent corrosion protection properties on AZ91 Mg alloy. The coating formed a compact, uniform and thick protective layer on the surface, and exhibited good mechanical properties and hydrophobicity.
Article
Chemistry, Physical
Tian -Li Wang, Muhammad Abubaker Khan, Chuang-Shi Feng, Man-Zhen Lin, Ghulam Yasin, Wei -Bing Liao
Summary: Designing multi-component alloys (MCAs) with precise composition and high performance remains challenging. In this work, a new high-throughput synthesis method is used to prepare Zr-Al-Ti-V-Cr MCAs, and independent specimens with gradient compositions are obtained simultaneously. The microstructures and mechanical properties of these specimens are investigated. It is found that the structure of the specimens transforms from fully amorphous to composite structures with amorphous and bcc-structured nanocrystals as the Zr content increases. A specimen with a composition of Zr84Al4Ti4V3Cr5 is identified to have the highest nanohardness and elastic modulus, attributed to its amorphous structure wrapped with tiny nanocrystals. Interestingly, there are nonlinear relationships between the chemical composition, microstructures, and mechanical properties, and specimens with low mixed entropy exhibit higher nanohardness and elastic modulus compared to those with high mixed entropy. This work provides a clue for the parallel development of MCAs with excellent performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Tian-Li Wang, Chuangshi Feng, Huibin Sun, Bin Wang, M. Hamza, Ghulam Yasin, Mohamed A. Afifi, Wei-Bing Liao
Summary: The lightweight refractory high entropy alloys (RHEAs) are considered as the best alternative to Ni-based superalloys, showing higher specific yield strength (SYS) and excellent ductility. The microstructure of Al0.5Ti2Nb1Zr1W0.5 RHEA, with a BCC structure merged with B2 nano-precipitates, plays a crucial role in its improved performance.
MATERIALS & DESIGN
(2022)
Article
Engineering, Civil
Muhammad Abubaker Khan, Yangwei Wang, Mohamed A. Afifi, Mohammad Tabish, Muhammad Hamza, Ghulam Yasin, Tahir Ahmad, Wei-Bing Liao
Summary: This study focuses on the newly developed (Al, Zn)(3)Zr precipitates through double aging treatment in an Al-Zn-MgCu alloy and their response to dynamic compression. The results show that the strength of the alloy is increased with an increasing strain rate, and the microstructures change after the dynamic compression.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Abba Bala Musa, Mohammad Tabish, Anuj Kumar, Manickam Selvaraj, Muhammad Abubaker Khan, Badria M. Al-Shehri, Muhammad Arif, Muhammad Asim Mushtaq, Shumaila Ibraheem, Yassine Slimani, Saira Ajmal, Tuan Anh Nguyen, Ghulam Yasin
Summary: Developing cost-effective and high-performance non-precious electrocatalysts for ORR is crucial for clean energy generation. Single-atom catalysts have shown significantly improved performance, but protecting their structure from deterioration is still a challenge. In this study, a simple strategy for protecting the structure of single-atom catalysts by implanting/decorating FeN4 on Fe-ZIF-derived carbon nanotubes is reported. The developed catalyst exhibits outstanding ORR activity in both acidic and alkaline media compared to commercial Pt/C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Wei-Bing Liao, Chen-Hao Xu, Tian-Li Wang, Chuang-Shi Feng, Muhammad Abubaker Khan, Ghulam Yasin
Summary: Nano-structured refractory high-entropy alloy films were prepared and their oxidation behavior and effects on microstructure and mechanical properties were investigated. The films exhibited stable structure and mechanical properties under oxidation conditions up to 400 degrees Celsius.
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Chenhao Xu, Muhammad Hamza, Mohamed A. Afifi, Naeem Akhtar Qaisrani, Huibin Sun, Bin Wang, Waheed Qamar Khan, Ghulam Yasin, Wei -Bing Liao
Summary: An investigation was conducted to study the influence of peak-ageing and double ageing treatments on the precipitation along different grain boundary orientations of an extruded Al-Zn-Mg-Cu alloy. The results showed that the type of grain boundary precipitates varied depending on the grain boundary orientation and treatment. The study provides new insights into engineering the grain boundary precipitates to achieve desired precipitate types and corresponding mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Muhammad Hamza, Jamieson Brechtl, Zahid Nazir, Naeem Akhtar Qaisrani, Ghulam Yasin, Tahir Ahmad, Wei-Bing Liao, Peter K. Liaw, Mohamed A. Afifi
Summary: A novel refractory high entropy alloy (RHEA) with a low-density and good specific strength and plasticity has been designed and studied. The alloy demonstrates excellent compressive plasticity and specific yield strength, showing potential for applications in high-temperature environments.
MATERIALS CHARACTERIZATION
(2023)