Article
Materials Science, Multidisciplinary
Soo-Bae Kim, Dae-Hwan Kim, Jae-Wook Kang, Tae-Min Koo, Yun-Soo Lee, Ji-Young Lee, Young-Hee Cho, Jung-Moo Lee
Summary: The role of ultrasonic melt treatment in improving the corrosion resistance of A356 alloy was investigated. The results confirmed that ultrasonic melt treatment can enhance the corrosion resistance of the A356 alloy by refining the microstructure and reducing the formation of intermetallics, allowing for uniform distribution of solutes within the matrix.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Soo-Bae Kim, Jae-Gil Jung, Young-Hee Cho, Su-Hyeon Kim, Kwangjun Euh, Jung-Moo Lee
Summary: The study investigates the effect of ultrasonic melt treatment (UST) on the solidification microstructure of an Al-5Ti-1B alloy, finding that UST can refine and improve the distribution of TiB2 and Al3Ti particles, while having a slight effect on grain refinement.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Meng Wang, Jianchao Pang, Xinfeng Liu, Jianqiu Wang, Yongquan Liu, Shouxin Li, Zhefeng Zhang
Summary: The microstructures of eutectic Al-Si alloys have a significant influence on the fatigue life and damage mechanisms under thermo-mechanical fatigue (TMF) loading. Ultrasonic melt treatment (UT) can effectively reduce the grain size and primary Si, resulting in an increased fatigue life. There are two different crack initiation mechanisms under TMF, which are fracture of Si particles and debonding of primary Si. The UT alloy exhibits a longer TMF life due to the refinement of microstructures, which plays an important role in improving fatigue resistance and life.
Article
Materials Science, Multidisciplinary
Luming Zeng, Guanming Xu, Chunming Wang, Tongxiang Liang
Summary: The microstructure and corrosion behavior of 7B85 Al alloy were investigated by ultrasonic surface rolling treatment (USRT). The accumulation of large plastic strain during the ultrasonic rolling led to the appearance of a high density of dislocation lines and tangles. The USRT alloy exhibited better corrosion behavior, primarily pitting corrosion accompanied by stress corrosion. The fine grain and micro-stress caused by dislocation accumulation facilitated the formation of dense corrosion product films, inhibiting the diffusion of chloride ions.
Article
Materials Science, Multidisciplinary
Cheng Li, Shusen Wu, Shulin Lu, Jianyu Li, Longfei Liu, Lanqing Xia
Summary: Based on the research results, ultrasonic treatment can effectively improve the mechanical properties of materials by refining grains and weakening segregation when the Zr content is equal or lower than 0.2 wt.%. However, when the Zr content is up to 0.25 wt.%, the effect is getting worse.
Article
Metallurgy & Metallurgical Engineering
Xingrui Chen, Chaoyang Yin, Qichi Le, Shaochen Ning, Fuxiao Yu
Summary: A novel alternating-frequency ultrasonic melt treatment (AUMT) technology is used to refine the grain and improve the strength of AS41 magnesium alloy. The AUMT exhibits better grain refinement efficiency than traditional methods and helps eliminate the agglomeration of Mg2Si, ultimately improving the tensile strength and elongation of AS41.
INTERNATIONAL JOURNAL OF METALCASTING
(2022)
Article
Nanoscience & Nanotechnology
Ming-Xue Zhang, Hong Ning, Cheng Wang, Kai Guan, Xuan Wang, Zhi-Gang Li, Hui-Yuan Wang
Summary: This study investigates the addition of 0.08 wt% Zr to Al-1.0Mg-1.2Si (6022) alloy and its effects on the solidification process of twin-roll casting (TRC). The addition of Zr promotes the transition from columnar to equiaxed structure and refines the solidification microstructure of the alloy. It also mitigates the macro-segregation during the solidification process of the TRC strip. The incorporation of Zr leads to the formation of (Al, Si)3Zr phases, which act as heterogeneous nucleation sites for α-Al dendrites and π-AlFeMgSi phase. The refinement of the microstructure reduces the secondary dendrite arm spacing and increases the partition coefficients of Mg and Si elements, resulting in the alleviation of central macrosegregation. The mechanical properties of the alloy strips, including fracture elongation and yield strength, are optimized with Zr addition. This work provides a strategy for effectively controlling macro-segregation and producing high-performance alloy strips through the TRC process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yubao Xiao, Tie Liu, Yuxin Tong, Meng Dong, Jinshan Li, Jun Wang, Qiang Wang
Summary: The high magnetic field has a significant impact on the microstructural evolution of peritectic Al-Ni alloy during directional solidification, with a clear dependence on pulling speed. At low pulling speeds, the magnetic field triggers the appearance of the Al3Ni2 phase; at high speeds, it induces phase segregation and eutectic formation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ho Sung Jang, Gyu Heun Lee, Jong Bae Jeon, Yoon Suk Choi, Sunmi Shin
Summary: This study investigates the effect and mechanism of ultrasonic melt treatment (UST) on achieving high-quality molten Al-Mg alloy. By analyzing the changes in molten aluminum cleanliness under different UST process conditions, such as ultrasonic power, treatment duration, and stabilization duration, the optimal UST conditions for producing high-quality molten aluminum are identified.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Jia Liu, Sten Lambeets, Matthew Olszta, Jonathan Poplawsky, Amit Shyam, Arun Devaraj
Summary: The combination of in-situ atom probe tomography and in-situ transmission electron microscopy can reveal the mechanisms of non-equilibrium solute segregation in high-temperature alloys, helping to design high-strength alloys.
MATERIALS RESEARCH LETTERS
(2022)
Article
Thermodynamics
Bo Dang, Zengyun Jian, Junfeng Xu
Summary: The effect of ultrasonic melt treatment (UST) on the thermal kinetics of hypereutectic Al-25%Si alloy during eutectic solidification was studied. UST treatment can decrease the activation energy and nucleation energy, leading to the refinement of the eutectic structure.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Cijun Shuai, Shiwei Zhong, Zhi Dong, Chongxian He, Yang Shuai, Wenjing Yang, Shuping Peng
Summary: This work proposes a strategy to transform the peritectic intermetallic phase of Zn-Fe alloy into eutectic intermetallic phase by adding Mn. The addition of Mn forms a (Fe, Mn)Zn13 phase, which provides nucleation substrate and increases the nucleation rate of the MnZn13 eutectic phase. The results show that the Zn-Fe-Mn alloy has significantly refined intermetallic compounds and improved strength and ductility compared to Zn-Fe alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Qing Sun, Ming Yang, Yun Jiang, Lei Lei, Yan Zhang
Summary: The corrosion resistance of 7075 aluminum alloy treated by ultrasonic surface rolling process (USRP) in a chloride environment was investigated. The effects of different USRP passes on the surface state, surface microstructure, and corrosion resistance were studied. The results showed that USRP treatment significantly improved the corrosion resistance, and the factors leading to this enhancement varied with different treatment passes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Materials Science, Multidisciplinary
Weixiang He, Yuliang Zhao, Qiuyun Wei, Huan Liu, Dongfu Song, Fanghua Shen, Zhenzhong Sun, Runxia Li
Summary: Ultrasonic melt processing and cooling rate have significant effects on the microstructure evolution of recycled Al-Cu alloys, resulting in refined grain size, inhibited growth of Fe-rich phases and pores.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Ruoqi Li, Masaaki Kondo, Tomohiro Suzuki, Asuka Suzuki, Naoki Takata
Summary: This study investigates the effect of adding 0.1 at% Ti on the microstructure and high-temperature mechanical performance of a heat-resistant Al-5Mg-3.5Zn-2Cu-2Ni alloy. The results show that Ti addition improves the creep properties of the alloy by refining the precipitation morphologies in the alpha-Al matrix, while maintaining static high-temperature strength and room-temperature ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Review
Materials Science, Multidisciplinary
Joe Elambasseril, Jason Rogers, Chris Wallbrink, David Munk, Martin Leary, M. Qian
Summary: The design freedom offered by additive manufacturing (AM) enables the fabrication of components with internal surfaces that are challenging to access post-manufacture. This is of concern, as the surface condition can markedly deteriorate fatigue performance. It is therefore desirable to consider deploying AM parts with no or minimal surface processing for targeted applications.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Huan Liu, Hai Wang, Ling Ren, Dong Qiu, Ke Yang
Summary: A new biomedical titanium-copper alloy was produced by adding copper element in pure titanium using laser powder bed fusion (LPBF). The addition of copper eliminates the strength-ductility mismatch caused by the usual microstructure of near alpha titanium alloy fabricated by LPBF. A boundary engineering strategy aiming to enhance the strength and ductility of the martensitic titanium alloy fabricated by LPBF was proposed. The Ti-5Cu alloy exhibits high tensile strength and excellent elongation, making it a promising titanium alloy for potential applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Haozhang Zhong, Tingting Song, Chuanwei Li, Raj Das, Jianfeng Gu, Ma Qian
Summary: The Gibson-Ashby (G-A) model is essential for designing additively manufactured metal lattice materials. However, it is only applicable to low-density lattice materials with strut length-to-diameter ratios greater than 5. This study reveals fundamental disconnections between the G-A model and additively manufactured metal lattice materials.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2023)
Article
Automation & Control Systems
Abduladheem Almalki, David Downing, Jordan Noronha, Jason Dash, Bill Lozanovski, Rance Tino, Ahmad Alghamdi, Mahyar Khorasani, Ma Qian, Milan Brandt, Martin Leary
Summary: This research proposes a method to characterize the impact of common LB-PBF powders and geometric design parameters on section properties of as-manufactured strut elements. Micro-computed tomography has been applied to algorithmically characterize the variation and identify a scale threshold below which additional geometric resolution does not influence the section properties. This methodology provides a robust and algorithmic design tool for additive manufacturing to characterize the effects of manufacturing and design parameters on the functional response of AM strut elements.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Edohamen Awannegbe, Huijun Li, Tingting Song, Frank Niessen, Ma Qian, Azdiar A. Gazder, Mitchel J. B. Nancarrow, Elena Pereloma
Summary: A bidirectional powder deposition strategy was used to additively manufacture Ti-15Mo wt% using laser metal deposition. The microstructure and deformation mechanisms were analyzed by X-ray diffraction, scanning electron microscopy, electron backscattering diffraction, and transmission electron microscopy. Three distinct zones, including fusion, remelted, and heat affected zones, were found in all 25 deposited layers with coarse columnar grains, and Mo segregation was observed in the microstructure. Deformation accommodation in the beta matrix was achieved by slip, twinning, and martensite and omega D formation contrary to the expected twinning.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Manufacturing
J. Noronha, J. Rogers, M. Leary, E. Kyriakou, S. B. Inverarity, R. Das, M. Brandt, M. Qian
Summary: In this study, hollow-strut metal lattices were successfully fabricated using laser powder bed fusion (LPBF) additive manufacturing (AM). It was found that both face-centered cubic (FCC) and FCC with Z-struts (FCCZ) Ti-6Al-4V lattice topologies exhibited mechanical properties close to solid-strut metal lattices. Moreover, the fine prior-beta grains in the Ti-6Al-4V hollow-strut thin walls contributed positively to the superior mechanical properties.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Xin Tong, Guohua Wu, Mark A. Easton, Ming Sun, Qiman Wang, Liang Zhang
Summary: This work reports the highest yield strength and elongation in an Mg-Y-RE-Zr alloy produced by an additive manufacturing (AM) process. A combination of a large-diameter welding wire and pulsed current was used to inhibit the oxidation of WE43 alloy fabricated by quasi-directed energy deposition using electric arc (quasi-DED-Arc). The results show that the amount of Y2O3 in this work is only 2-5% of that of the sample produced by powder bed fusion (PBF) reported previously. Moreover, the variable solidification conditions and in-situ heat treatments induced by the multiple thermal cycles (MTCs) were found to result in an inhomogeneous microstructure along the building direction, which are responsible for the variations in mechanical properties. The WE43 alloy exhibits excellent mechanical properties due to the intrinsic heat treatment that occurs during the build process. The 8th layer exhibits a maximum tensile strength of 347 MPa and a good elongation of 7.1%, which exceeds the strength-ductility combinations for cast WE43 alloy. The strengthening mechanisms in different layers have been discussed. A physical model depicting the microstructural transformation during quasi-DED-Arc has been proposed based on the measured thermal cycling data and microstructure observations.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Manufacturing
L. Afroz, S. B. Inverarity, M. Qian, M. Easton, R. Das
Summary: Additive manufacturing (AM) is a developing manufacturing technology with excellent attributes, but defects hinder the mechanical properties of parts. Numerical prediction based on specified conditions can be an alternative to experimental analysis at the design stage of AM parts. This study performed elastic-plastic finite element analysis to analyze the stress distribution around pores and their effect on fatigue life for AlSi10Mg alloy samples produced by laser powder bed fusion. The proposed model shows approximately 5% error with experimental results at high stress loading conditions.
PROGRESS IN ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Mechanical
Hai Wang, Konrad Koenigsmann, Shuyuan Zhang, Yi Li, Huan Liu, Hui Liu, Ling Ren, Dong Qiu, Ke Yang
Summary: Superplasticity at low temperatures and high strain rates has been achieved in a Ti6Al4V5Cu model alloy using a multiphase nanocrystalline network (MPNN). The onset temperature for superplasticity in this alloy is 250°C lower than that of Ti6Al4V alloy, and it exhibits superplasticity even at extremely high strain rates. This research is significant for the development of more economical and efficient superplastic deformation processes.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Letter
Materials Science, Multidisciplinary
H. Z. Zhong, T. Song, R. Das, C. W. Li, J. F. Gu, M. Qian
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jason Rogers, Ma Qian, Joe Elambasseril, Colin Burvill, Craig Brice, Chris Wallbrink, Milan Brandt, Martin Leary
Summary: Additive manufactured (AM) components are increasingly used in fatigue-limited and safety-critical applications, requiring reliable predictions of the fatigue response. Published AM fatigue data must be accompanied by robust documentation to ensure confident adoption. Currently, there is no formal method for quantifying the uncertainty in published AM fatigue test data. This study proposes documentation criteria based on recognised standards and introduces applicability indices to quantify the uncertainty of reported AM fatigue test data, providing a new way to evaluate the suitability of fatigue data for specific applications.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Suming Zhu, Indrajeet Katti, Dong Qiu, Joy H. Forsmark, Mark A. Easton
Summary: This study investigates the microstructure of PBF-LB AlSi10Mg and the effects of platform preheating and heat treatment on its mechanical properties. Preheating to 150°C improves strength, and T5 treatment further increases yield strength and tensile strength but reduces ductility. RST-T6 treatment enhances ductility while maintaining yield strength but decreases tensile strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Q. Zhou, X. Z. Zhang, T. Song, S. L. Lu, T. Dong, H. P. Tang, M. Qian
Summary: In this study, the fabrication of Ti-1Al-8V-5Fe (Ti-185) alloy using laser directed energy deposition (L-DED) was investigated. The precipitate phases along the build height were found to have a significant influence on the tensile properties of the alloy. The formation of the embrittling isothermal omega-phase (omega iso) was found to result in zero plasticity in the top region of the sample, while the middle region without the omega-phase exhibited significant tensile ductility and strength. Furthermore, it was demonstrated that converting the isothermal omega-phase to the athermal omega-phase (omega ath) restored the tensile ductility of the alloy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
S. L. Lu, D. Han, D. Y. Qin, T. Song, D. Qiu, M. Brandt, H. P. Tang, M. Qian
Summary: Massive transformations occur in titanium alloys, resulting in patch-like massive phases that traverse the parent prior-beta grain boundaries. The formation of these phases always occurs when two neighboring prior-beta grains share or nearly share a {110} pole. These phases display concentrated {0001} poles and tend to decompose into ultrafine alpha-beta lamellae.
SCRIPTA MATERIALIA
(2024)