Article
Automation & Control Systems
Jilai Wang, Zhifei Xiao, Xin Wang, Yan Sun, Chaoyang Sun
Summary: This study investigates the progressive sheet forming of magnesium-lithium alloy sheets and predicts the ductile fracture behavior using a modified Gurson-Tvergaard-Needleman (GTN) damage model. The results show that increasing grain size deteriorates the forming defects.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Rongrong Sun, Meiyi Yao, Jie Zhang, Haoyu Wang, Xiaodong Lin, Wenhuai Zhang, Yunlong Qiu, Jian Yang, Guoguang Cheng, Jianxin Dong
Summary: The results show that Fe22Cr5Al3Mo-xY alloys formed a four-layered oxide film structure in the superheated steam environment, consisting of Fe oxide, Cr oxide, mixed oxide region, and Al oxide. Near the oxide/metal interface, there was the presence of alpha-(Fe, Cr) in the Al2O3 layer. The addition of Y element delayed the formation of large iron oxide particles and increased the ratio of Cr2O3 film thickness to the thickness of the flat oxide film area, thus improving the corrosion resistance of the alloys.
Article
Materials Science, Multidisciplinary
Qiang Zhu, Dong Luan, Linfu Zhang, Guohua Fan, Heyong Qin, Peng Zhang
Summary: With the development of product miniaturization, nickel-based superalloy thin sheets have become crucial materials for micro-components in fields such as aerospace. However, there is a lack of in-depth research on the mesoscale formability of these alloys under the coupled effects of multiple factors. In this study, a test platform was constructed to analyze the mesoscale forming limit and investigate the influences of feature size and precipitation on the formability of a nickel-based superalloy. The results revealed that feature size and particle size/volume content of precipitated phase had significant impacts on the forming limit of the alloy at the mesoscopic scale.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Guangchun Wang, Juanjuan Han, Yao Lin, Wei Zheng
Summary: This study investigates the impact of grain size and grain orientation on surface roughness by building polycrystalline models with rough surfaces. By introducing a scale parameter, the size effect of contact normal pressure under different grain sizes is determined. A prediction model for surface roughness in micro-forming considering size effect is established and validated for rationality and accuracy.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yi Chen, Li Zhang, Ji-Fei Zhu, Zhi-Qiang Zhong, Jing-Hong Gu
Summary: For a coated cutting tool, film adhesion and cohesive failure resistance are equally important parameters. The effect of WC grain size and Co content on these parameters was investigated using WC-Co cemented carbides as substrates. A PVD-Ti0.94Si0.06N/TiAlSiN/Al0.52Ti0.48N multilayer coating was deposited on the substrates. The results showed that film adhesion is positively correlated with substrate hardness, but cohesive failure resistance decreases significantly when Co <= 6 wt%. The micro-strengthening mechanism involves coherent/semi-coherent WC/film interfaces and plastic deformation of the binder phase constrained by the WC hard phase.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jing Qin, Chen Zhou, Dongsheng Wang, Xun Li, Tongsheng Hu, JingWen Wang, Youwen Yang
Summary: This study analyzed the effects of different microstructures and textures on the deep drawability of copper sheets. The results showed that texture differences had a significant impact on the quality of deep drawing, with a strong Cube texture being unfavorable and the coexistence of S, Copper, Brass, and Goss texture components being beneficial.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Industrial
Yanle Li, Ganglin Zhao, Dayong An, Jun Chen, Guoqun Zhao
Summary: This study demonstrates a novel macro micro-integrated incremental sheet forming (MMI-ISF) process for manufacturing both macroscopic geometric shapes and surface microfeatures on metal sheets. The experimental results show that the MMI-ISF process improves the uniformity, surface quality, and mechanical properties of the formed parts. The study also investigates the microstructure evolution of the formed parts, revealing the forming mechanism of the MMI-ISF process.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mei Yang, Zhidong Chang, Jun Chen, Dayong An
Summary: The precipitation behavior of Al13Fe4 in AA5052 sheet during friction stir-assisted incremental sheet forming (FS-ISF) is investigated in this study. It is found that both incoherent and semi-coherent precipitates increase in size, and their content increases with the temperature caused by the high-speed rotation of the tool. Dense dislocations emerge and interact around these precipitates. Transmission electron microscopy (TEM) analysis reveals that dislocations can induce precipitation by promoting atomic segregations of Fe and Al elements. The strength of FS-ISFed AA5052 is further enhanced compared to conventional incremental sheet forming at room temperature (RT-ISF).
Article
Materials Science, Multidisciplinary
Zhendong Yin, Songsheng Lin, Zhiqiang Fu, Yao Wang, Chuan Hu, Yifan Su
Summary: This paper investigates the effect of sputtering process parameters on the uniformity of copper film deposited in micro-via using DC magnetron sputtering technology. It is found that sputtering power, bias voltage, and working pressure significantly influence the uniformity of the deposited copper film, while rotating speed and deposition time have less impact.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yuanyu Liu, Zijian Wang, Yanle Li, Hao Yuan, Fangyi Li
Summary: This study proposed a hybrid manufacturing process that combines thermal spraying and incremental forming process to reduce the manufacturing cycle and improve forming performance. The effects of different thermal spraying parameters on sheet metal forming and mechanical properties were investigated, showing significant improvements under appropriate thermal spraying power. The thermal spraying pre-treatment reduced axial forming force and increased forming limit during ISF process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Chemistry, Physical
Valentin Oleksik, Tomasz Trzepiecinski, Marcin Szpunar, Lukasz Chodola, Daniel Ficek, Ireneusz Szczesny
Summary: Incremental sheet forming of titanium and its alloys plays a significant role in modern manufacturing industry by producing high-quality, complex-shaped products at low cost. The development of single-point incremental forming technique in titanium alloys, especially for difficult-to-form types, is highlighted, with potential applications in various industries, particularly in the medical field. The need for appropriate lubrication in the forming process of titanium alloys is emphasized due to their unfavorable tribological properties. Insufficient research on the synergistic effect of rotational speed and tool rotation direction on surface roughness of workpieces was also noted in the literature review.
Article
Materials Science, Multidisciplinary
Jae-Hoon Choi, Hojang Kim, Ji-Young Kim, Kwang-Hyeok Lim, Byung-Chai Lee, Gi-Dong Sim
Summary: In this study, the additional length scale parameter in the couple stress theory was measured experimentally, and the physical origin of this parameter was discussed. The results showed that both the elastic modulus and bending rigidity increased as the material thickness decreased.
MATERIALS & DESIGN
(2022)
Article
Engineering, Manufacturing
Saman Khalilpourazary
Summary: Equal channel angular pressing was utilized to enhance the mechanical properties of pure copper initial billets for micro gear manufacturing. Microhardness in micro gears was found to be higher when using ECAPed copper compared to annealed samples. The microstructure differences within the micro gears were determined by the location and initial microstructure of the billets used in the micro-extrusion process.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yihao Tang, Bo Li, Guofeng Zhang, Pengfei Ji, Xinyu Zhang, Mingzhen Ma, Riping Liu
Summary: The study showed that adding different amounts of Al can alter the microstructure of high-Mn steel and enhance its corrosion resistance, resulting in improved performance in NaCl and NaHSO3 solutions.
Article
Engineering, Industrial
Shiromani Gangoda Desinghege, Peter Hodgson, Matthias Weiss
Summary: This study investigated the effect of material strength, grain size, and C-axis orientation on springback in AZ31 magnesium sheet metal. The research found that springback decreases with increasing grain size but does not change with C-axis orientation, showing more correlation with bending yield strength than tensile yield strength. Experimental results were used to develop analytical equations to explain the impact of material anisotropy on springback behavior in magnesium.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
