Article
Metallurgy & Metallurgical Engineering
Pengliang Jin, Deli Shang, Guocheng Wang, Yuanyou Xiao, Lei Cao
Summary: The precipitation of TiS in an Al-Ti simultaneously deoxidized steel was observed, showing the formation of single TiS, two-layered oxide (Al2O3 or TiOx)-TiS composite, and three-layered Al2O3-TiOx-TiS composite inclusions. Thermodynamic calculations revealed that the precipitation of TiS in the experimental steel during solidification is related to the solid fraction, while TiOx precipitation depends on the equilibrium partition of oxygen. The enrichment of oxygen in the residual liquid steel results in the formation of TiOx during solidification.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Pengliang Jin, Yiming Yang, Lei Cao, Xinghu Yuan, Guocheng Wang
Summary: Two groups of Al and Ti-Mg complex deoxidized steels with different S contents were studied. Inclusion characteristics of the steel samples were observed using field-emission scanning electron microscopy-energy-dispersive spectroscopy. The results showed that both low-sulfur and high-sulfur steel samples had TiS inclusions, MgAl2O4 (Al2O3)-TiS, and MgAl2O4-TiN-TiS complex inclusions, but only the high-sulfur steel had complex inclusions containing MnS. The study further analyzed the precipitation mechanism of MnS and calculated the mass fractions of different inclusions. The results suggested that MnS precipitated on TiS, which was consistent with the observation of TiS-MnS interface in the complex inclusions of the high-sulfur steel. This study is useful for controlling sulfide precipitation in Al and Ti-Mg complex deoxidized steel.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Henri Tervo, Antti Kaijalainen, Vahid Javaheri, Mohammed Ali, Tuomas Alatarvas, Mikko Mehtonen, Severi Anttila, Jukka Komi
Summary: This study assessed the effects of varying fractions of acicular ferrite (AF) on the heat-affected zone of steels. Contrary to expectations, the steel with little or no AF in the microstructure showed the highest impact toughness, while steels with higher fractions of AF had lower impact toughness.
Article
Materials Science, Multidisciplinary
Yongkun Yang, Dongping Zhan, Hong Lei, Yulu Li, Xin Liu, Zhouhua Jiang, Huishu Zhang
Summary: The research showed that the re-heating temperature and holding time significantly affected the morphology and chemical composition distribution of inclusions in Ti-Zr deoxidized low carbon steel. Additionally, different cooling methods also had a notable impact on the characteristics of inclusions.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Lei Wang, Bo Song, Jinghong Mao, Xiaokang Cui, Zhen Liu, Longfei Li
Summary: This study investigates the effect of Mg content on inclusions and microstructure of Ca-La-treated steel. The results show that Mg content has an impact on the composition and density of inclusions, as well as the formation of acicular ferrite (AF).
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jun Wang, Linzhu Wang, Xiang Li, Junqi Li, Chaoyi Chen, Changrong Li, Changling Zhuang
Summary: This study investigates the thermodynamic stability and evolution process of inclusions in Al-Ti deoxidized steels through laboratory experiments and thermodynamic calculations. The results show that the TiOx content of inclusions increases with the increase in titanium addition, and the composition of typical inclusions changes from pure Al2O3 to multi-phase Al-Ti complex inclusions and Al2O3-TiOx complex inclusions. The research also obtained the predominance diagrams of the Al-Ti-O-Fe system through thermodynamic calculations and compared the results with experimental data.
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Lei Wang, Bo Song, Zhan-bing Yang, Xiao-kang Cui, Zhen Liu, Wen-sen Cheng, Jing-hong Mao
Summary: The evolution of inclusions and the formation of acicular ferrite in Ca-Ti treated steel after Mg and La addition were systematically investigated. The types of inclusions in the molten steel and final quenched samples were similar, but with differences in morphology, where the La-containing sample had the smallest average inclusion size and highest number density. Additionally, the percentage of acicular ferrite increased due to the increase in effective inclusions in the La-containing sample.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Yong-kun Yang, Jia-yu Zhu, Xiao-ming Li, Yang Wang, Cheng-jun Liu, Dong-ping Zhan
Summary: The effects of different hot deformation amounts on the evolution of inclusion and microstructure in Ti-Zr deoxidized steel were investigated. The results showed that the hot deformation amount had no significant effect on the number density of oxide. However, it influenced the aspect ratio and fragmentation of MnS and nitride, as well as the breakage and extension of sulfide. Additionally, the hot compression amount affected the types of ferrite and the grain size in the microstructure.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Physical
Stefan Gneiger, Nikolaus P. Papenberg, Aurel R. Arnoldt, Carina M. Schloegl, Martin Fehlbier
Summary: Magnesium alloys are of particular interest in transportation due to their low mass and high specific stiffness. While widely accepted in high-volume applications such as gearbox housings and steering wheels, they currently find little to no industrial use in forming processes like extrusion and forging. Research on high-strength Mg alloys is ongoing worldwide, mostly relying on high levels of rare earths, raising questions about their ecological and economic sustainability.
Article
Materials Science, Multidisciplinary
Yuhang Guo, Lei Cao, Guocheng Wang, Chunwei Liu
Summary: High-Al steel was prepared under laboratory conditions, and the characteristics and formation mechanism of inclusions in the steel were studied through microscopy observation and thermodynamic calculation. The results showed that the size of AlN inclusions at the end of solidification ranged from 1 to 7 μm, and AlN could serve as an effective site for MnS nucleation.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhiqi Xie, Weijun Hui, Saiyihan Bai, Yongjian Zhang, Xiaoli Zhao
Summary: The impact fracture behavior of a Fe-25Mn-10Al-1.1C austenitic low-density steel was studied under two solution treatment temperatures. The presence of alpha + kappa-carbides at austenite grain boundaries resulted in a significant difference in V-notch impact energy between the samples treated at 800 degrees C (S8 sample) and 1000 degrees C (S10 sample), with values of 16.8 and 67.0 J, respectively. Differences in deformation characteristics, grain boundary precipitation of carbides, and the proportion of high-angle grain boundaries (HAGBs) and twins were identified as the main reasons for the disparity in impact toughness. The relatively low impact energy of the S10 sample compared to other high-Mn steels was also discussed.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yichang Wang, Lingfei Cao, Xiaodong Wu, Xiaomin Lin, Tianyu Yao, Liming Peng
Summary: In this study, the effects of minor Ti, Mn, Cr, Zr, and Er additions on cast Al-Zn-Mg-Cu alloys were investigated. The addition of Ti significantly refines the ingot grains, while Mn and Cr additions reduce impurities and form specific phases. The joint addition of Ti, Mn, Cr, Zr, and Er creates a bulk composite phase. The alloy with the joint addition of these elements exhibits the highest hardness due to collaborative strengthening effects.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Manufacturing
Yuchen Dong, Hongyang Wang, Dongshuai Wang, Ziqian Sun, Liming Liu, Xiaosheng Zhang
Summary: Based on the laser-arc hybrid welding source, the welding assisted riveting hybrid bonding technology was used to join magnesium and aluminum alloys. The study explored the fracture mechanism and the effect of welding penetration on mechanical properties. The optimal mechanical properties of the hybrid bonding joint were achieved at a specific penetration, and the addition of rivets enhanced the stability and mechanical performance of the welded structure.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Gi-Dong Park, Ji Hoon Yang, Kyung-Hwang Lee, Hyo-Jin Kim, Seung-Hyo Lee, Jun Kang, Yong-Sup Yun, Myeong-Hoon Lee
Summary: Alloy films with excellent corrosion resistance were fabricated by depositing an Mg film on Al-Si coated steel sheets and applying heat treatment. The Mg in the film was widely distributed in a dissolved state on the AI phase and continuously involved in the corrosion product formation reaction, leading to the excellent barrier effect against corrosion factors. The corrosion resistance evaluation results were explained by analyzing the properties of the alloy film and the mechanism of forming corrosion products.
Article
Spectroscopy
Kristjan Leosson, Sai Krishna Padamata, Rauan Meirbekova, Gudrun Saevarsdottir, Sveinn Hinrik Gudmundsson
Summary: In this study, Ti concentration in dilute Al-Ti alloys was measured using laser-induced breakdown spectroscopy (LIBS). The LIBS analysis accurately detected dissolved Ti concentration in the melt and revealed the formation and dissolution process of the Al3Ti phase with temperature changes in real time.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Metallurgy & Metallurgical Engineering
Cheng Yuan, Yu Liu, Guang-qiang Li, Yong-shun Zou, Ao Huang
Summary: Microporous magnesia castable shows promising effect on the cleanliness of high-Al steel, with the formation of continuous MgO·Al2O3 layer and lower inclusion content.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Lei Han, Yu Chen, Haijun Zhang, Guangqiang Li, Quanli Jia, Shaowei Zhang
Summary: High-entropy transition-metal carbide ceramics consisting of multiple principal components have higher configuration entropy and better performance. However, their synthesis poses challenges. In this study, a six-principal-component aerogel was successfully prepared using a low-temperature carbothermal reduction/partial sintering technique, demonstrating excellent microstructure and performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Shaofei Li, Huajian Zhang, Yongshun Zou, Huazhi Gu, Ao Huang, Lvping Fu, Guangqiang Li, Liwang Wang
Summary: The microstructure evolution of four types of Al2O3-SiO2 based aggregates during hydrogen corrosion at elevated temperature was investigated. The results showed that SiO2 impurity in brown corundum was partially reduced, forming rod-like or flaky intergranular grains. Porous structure was produced in bauxite due to the reduction of intergranular silicon compounds. Mullite achieved better corrosion resistance than bauxite due to high densification structure preventing further hydrogen penetration.
CERAMICS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Yigui Lao, Yunming Gao, Cheng Yuan, Guangqiang Li
Summary: The apparent contact angles between molten steel with different [Al] contents and the microporous MgO substrates were measured. As the [Al] content increased, the transformation route of interfacial products changed. The dissolution of CaO·ZrO2(s) in the substrate was affected by FeO at lower [Al] content but was mainly influenced by the consumption of MgO at higher [Al] content.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Tengfei Li, Guangqiang Li, Xijie Wang, Xiaoxuan Deng, Yu Liu
Summary: The interaction between slag and GCr15 steel under argon and vacuum conditions was investigated. The results showed a reduction in the size and proportion of inclusions after slag-steel interaction. Compared to the argon test, the inclusion size in the steel tested under vacuum was smaller and more uniform. This was attributed to the promotion of carbon and oxygen reaction to form CO in the molten steel under vacuum. The study also revealed the reduction of La2O3 in molten slag to dissolved La in liquid steel under vacuum conditions, leading to finer microstructure and primary carbides in the tested steel.
Article
Materials Science, Multidisciplinary
Jinshuai Zhang, Guangqiang Li, Honghong Wang, Xiangliang Wan, Mingfeng Hu, Yulong Cao
Summary: The microstructure and mechanical properties of cryogenic high-Mn austenitic steel weld metals with different Ce contents were studied. The addition of Ce refined the grain size, increased the proportion of high-angle grain boundaries, and modified the main inclusions. The presence of Ce significantly improved the cryogenic impact toughness, yield strength, tensile strength, and total elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Qinyu He, Chengyi Zhu, Yulong Liu, Wen Yan, Xiangliang Wan, Guangqiang Li
Summary: The microstructure, texture, mechanical properties, and magnetic properties of low carbon and silicon non-oriented electrical steels annealed at different temperatures were investigated. The results showed the presence of various precipitates, including fine precipitates and composite precipitates, in the samples annealed at higher temperatures. The magnetic properties of the experimental samples were found to be superior to commercially available steels of the same grade.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Siyuan Luo, Shuai Zhang, Hewei Yuan, Zhenhua Wu, Ming Li
Summary: The construction of 3D hierarchically heterostructured nanoarrays is an efficient approach for developing high-performance PEC cells for water splitting. In this study, novel 3D branched Cu2S/ZnO heterojunction nanowire arrays are fabricated as photocathodes for enhanced PEC water splitting. The 3D Cu2S/ZnO NWAs demonstrate improved light trapping ability and higher photocurrent density compared to pristine Cu2S NWAs, with an optimal IPCE of 10.5% at 450 nm. The enhanced performance can be attributed to increased light absorption and stepwise band-edge structure for charge separation and transport.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Ying Liu, Wen Yan, Zhe Chen, Junfeng Chen, Yu Liu, Guangqiang Li
Summary: Two kinds of MgO ceramic filters, prepared from porous magnesia powder and fused magnesia powder, respectively, were studied in terms of their microstructures, mechanical properties, and purification efficiency on molten steel. The filter PM, made from the porous magnesia powder, showed improved rheological properties and better purification efficiency compared to the filter FM. The reason for this was attributed to the finer and uniformly distributed nano-sized Mg(OH)2 particles generated by the hydration of the porous magnesia powder, which optimized the macropore structure and promoted the growth of the sintering neck between the microparticles of the skeleton.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Zheng Han, Wen Yan, Junjie Yan, Zhe Chen, Xiao Wang, Guangqiang Li
Summary: In this study, lightweight MgO-MgAl2O4 refractory aggregates with core-shell structures were prepared using in-situ decomposition synthesis technology. The effect of nano-size Al2O3 content on the microstructures and properties was investigated. The results showed that the addition of 9 wt% nano-size Al2O3 resulted in optimized specimens with microporous MgO@MgAl2O4 core-shell structures, a median pore size of 268 nm, a high compressive strength of 105 MPa, and a low thermal conductivity of 4.1 W/(m center dot K) at 800 degrees C.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yongshun Zou, Huazhi Gu, Ao Huang, Lvping Fu, Guangqiang Li, Liwang Wang, Ding Chen
Summary: This study utilized microporous magnesia to improve the high-temperature performance of magnesia castables, which provides a potential approach for making clean steel in tundish.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Chengyang Hu, Chengjie He, Xiaoxiong Zhu, Hangyu Dong, Xiangliang Wan, Guangqiang Li, Kaiming Wu
Summary: By adjusting the annealing temperature, different homogeneous or heterogeneous structures of austenitic stainless steel samples can be obtained. In the nano-grained/ultrafine-grained heterogeneous structure, the hetero-zone boundaries not only provide extra hardening effect, but also coordinate inhomogeneous deformation to promote the transformation induced plasticity effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Zekun Liu, Shuai Zhang, Zhenhua Wu, Erzhen Mu, Hong Wei, Yan Liu, Huilie Shi, Zhiyu Hu
Summary: By improving microfabrication technology, we have successfully developed a highly integrated micro thermoelectric device (TED) with enhanced interfacial and structural qualities at a high filling factor of 61%. This micro-TED achieved an open-circuit voltage of 2.6 V and an output power of 1.2 mW with a temperature difference of 62.8 K. It can generate a temperature gradient of up to 600 K/mm and achieve a net cooling temperature of 3.6 K. As a novel microflow sensor, the micro-TED can detect ultra-slow cold/hot airflows down to 4 mm/s.
Article
Materials Science, Multidisciplinary
Rong Zhu, Chengyi Zhu, Shuang Wu, Xiangliang Wan, Guangqiang Li
Summary: Ni-Co-CeO2 composite coatings were prepared on the surface of the copper plate by electroplating technology to improve the property and service life of continuous casting copper mould. CeO2 addition increased the Co content of the coatings and formed a dense cellular surface structure. The coatings exhibited enhanced hardness, corrosion resistance, and high-temperature wear resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zigui Luo, Zhenjia Yang, Shangwei Jiang, Wei Wu, Guangqiang Li, Xi'an Fan
Summary: The design of magnetic insulation coating structure has always been a challenge for high-performance soft magnetic composites (SMCs). In this study, Fe-Si SMCs with silicate/nano-Fe composite coating were prepared successfully by in-situ oxidation method combined with spark plasma sintering (SPS). The formation mechanism of the composite coating and its effect on the electro-magnetic properties of Fe-Si SMCs were investigated.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
