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Dual-Material Electron Beam Selective Melting: Hardware Development and Validation Studies Article

Chao Guo, Wenjun Ge, Feng Lin

Engineering 2015, Volume 1, Issue 1,   Pages 124-130 doi: 10.15302/J-ENG-2015013

Abstract:

Electron beam selective melting (EBSM) is an additive manufacturing technique that directly fabricates three-dimensional parts in a layerwise fashion by using an electron beam to scan and melt metal powder. In recent years, EBSM has been successfully used in the additive manufacturing of a variety of materials. Previous research focused on the EBSM process of a single material. In this study, a novel EBSM process capable of building a gradient structure with dual metal materials was developed, and a powder-supplying method based on vibration was put forward. Two different powders can be supplied individually and then mixed. Two materials were used in this study: Ti6Al4V powder and Ti47Al2Cr2Nb powder. Ti6Al4V has excellent strength and plasticity at room temperature, while Ti47Al2Cr2Nb has excellent performance at high temperature, but is very brittle. A Ti6Al4V/Ti47Al2Cr2Nb gradient material was successfully fabricated by the developed system. The microstructures and chemical compositions were characterized by optical microscopy, scanning microscopy, and electron microprobe analysis. Results showed that the interface thickness was about 300 μm. The interface was free of cracks, and the chemical compositions exhibited a staircase-like change within the interface.

Keywords： additive manufacturing     electron beam     selective melting     gradient materials     titanium alloy     TiAl alloy    

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A novel shape memory alloy actuated soft gripper imitated hand behavior

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0700-8

Abstract: The limited length shrinkage of shape memory alloy (SMA) wire seriously limits the motion range of SMA-based

Keywords： shape memory alloy (SMA)     pre bent     wire     gripper     grasping mode     lightweight    

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Numerical analysis of aluminum alloy reticulated shells with gusset joints under fire conditions

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 448-466 doi: 10.1007/s11709-022-0910-5

Abstract: In this study, a numerical analysis was conducted on aluminum alloy reticulated shells (AARSs) with gusset

Keywords： aluminum alloy reticulated shell     gusset joint     numerical analysis     fire resistance    

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Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1565-1580 doi: 10.1007/s11709-022-0867-4

Abstract: This study proposes a shape optimization method for K6 aluminum alloy spherical reticulated shells withpractical design tables containing the parameters of the optimized shape are obtained for aluminum alloy

Keywords： shape optimization     aluminum alloy     spherical reticulated shell     non-linear buckling     material nonlinearity    

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Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0720-4

Abstract: Aerospace aluminum alloy is the most used structural material for rockets, aircraft, spacecraft, andquantity lubrication have become the bottleneck of lubrication and heat dissipation of aerospace aluminum alloy

Keywords： milling     force     nanofluid minimum quantity lubrication     aerospace aluminum alloy     nano biological lubricant    

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Advances in chemical synthesis and application of metal-metalloid amorphous alloy nanoparticulate catalysts

WU Zhijie, LI Wei, ZHANG Minghui, TAO Keyi

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 87-95 doi: 10.1007/s11705-007-0018-4

Abstract: This paper reviews the advances in the chemical synthesis and application of metal-metalloid amorphous alloyAfter a brief introduction on the history of amorphous alloy catalysts, the paper focuses on the propertiesand characterization of amorphous alloy catalysts, and recent developments in the solution-phase synthesisof amorphous alloy nanoparticles.amorphous alloys, with special emphasis on the problems and strategies for the application of amorphous alloy
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Application of cold spraying for flux-free brazing of aluminium alloy 6060

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 256-260 doi: 10.1007/s11465-010-0095-9

Abstract: In the present study, samples of aluminium alloy 6060 were coated by cold spraying with a powder of brazingalloy Al12Si.The results show that the brazing alloy Al12Si could be very well deposited on the substrate by cold

Keywords： aluminium alloy     flux-free brazing     cold spraying     shear strength    

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Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation

Xinxiang Cao,Arash Mirjalili,James Wheeler,Wentao Xie,Ben W.-L. Jang

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 442-449 doi: 10.1007/s11705-015-1547-x

Abstract: transmission electron microscopy (HAADF-STEM) and H chemisorption results confirmed that Pd-Cu single-atom alloywhen the conversion of acetylene was above 99%, the selectivity of ethylene of these three single atom alloyFurthermore, the single atom alloy catalyst prepared by sequential incipient wetness impregnation was

Keywords： H2 pulse chemisorption     palladium-copper bimetallic catalyst     single atom alloy     acetylene hydrogenation    

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Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 48-64 doi: 10.1007/s11709-014-0271-9

Abstract: To improve the design methods of Chinese aluminum alloy members, experiment of 63 profiled aluminum alloymembers, made of Chinese aluminum alloy 6061-T6, under axial compression is conducted in this paper.Furthermore, for the purpose of creating column curves, the aluminum alloy members under the axial compression

Keywords： aluminum alloy     column curve     compression members     overall stability coefficient    

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Formic acid dehydrogenation reaction on high-performance PdAu alloy nanoparticles prepared by the eco-friendly

Frontiers in Energy   Pages 751-762 doi: 10.1007/s11708-023-0895-3

Abstract: Dehydrogenation of formic acid (FA) is considered to be an effective solution for efficient storage and transport of hydrogen. For decades, highly effective catalysts for this purpose have been widely investigated, but numerous challenges remain. Herein, the PdxAu1−x (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) alloys over the whole composition range were successfully prepared and used to catalyze FA hydrogen production efficiently near room temperature. Small PdAu nanoparticles (5–10 nm) were well-dispersed and supported on the activated carbon to form PdAu solid solution alloys via the eco-friendly slow synthesis methodology. The physicochemical properties of the PdAu alloys were comprehensively studied by utilizing various measurement methods, such as X-ray diffraction (XRD), N2 adsorption–desorption, high angle annular dark field-scanning transmission electron microscope (HAADF-STEM), X-ray photoelectrons spectroscopy (XPS). Notably, owing to the strong metal-support interaction (SMSI) and electron transfer between active metal Au and Pd, the Pd0.5Au0.5 obtained exhibits a turnover frequency (TOF) value of up to 1648 h−1 (313 K, nPd+Au/nFA = 0.01, nHCOOH/nHCOONa = 1:3) with a high activity, selectivity, and reusability in the FA dehydrogenation.

Keywords： FA dehydrogenation     face-centred cubic structures     PdAu solid solution alloy nanoparticles     slow synthesis    

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Parameter prediction in laser bending of aluminum alloy sheet

WANG Xuyue, XU Weixing, CHEN Hua, WANG Jinsong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 293-298 doi: 10.1007/s11465-008-0046-x

Abstract: network model is established to predict the bending angle in the laser bending process of an aluminum alloy

Keywords： control     industry purpose     nonlinear     network     aluminum    

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Grindability of high-temperature alloy with ceramic alumina wheels

ZHANG Hongxia, CHEN Wuyi, CHEN Zhitong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 139-145 doi: 10.1007/s11465-008-0040-3

Abstract: The grindability of high-temperature alloy by using ceramic alumina wheels is studied on the basis ofThe grinding burn mechanism of high-temperature alloy is unveiled and the feasible grinding parametersvelocity of the wheel is 18–22 m/s and the depth of grinding should not exceed 0.02 mm in grinding GH2132 alloythat of the base material, which deteriorates the mechanical properties and heat resistance of GH2132 alloya theoretical and experimental basis for technical optimization in the grinding of high-temperature alloy

Keywords： metallographic     topography     grinding GH2132     resistance     decrease    

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Carbon-coated Ni-Co alloy catalysts: preparation and performance for aqueous phase hydrodeoxygenation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3,   Pages 443-460 doi: 10.1007/s11705-021-2079-1

Abstract: Carbon-coated Ni, Co and Ni-Co alloy catalysts were prepared by the carbonization of the metal dopedThe metallic Ni, Co, and Ni-Co alloy particles (mainly 10–12 nm) were uniformly distributed in carbonA charge transfer from Ni to Co appeared in the Ni-Co alloy.Compared with those of metallic Ni and Co, the d-band center of the Ni-Co alloy shifted away from

Keywords： Stöber method     carbon-coated Ni-Co alloy     in-situ hydrodeoxygenation     methyl palmitate     decarbonylation    

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Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 163-175 doi: 10.1007/s11709-014-0272-8

Abstract: This paper presents an investigation on the flexural-torsional buckling behavior of aluminum alloy beamsFirst, based on the tests of 14 aluminum alloy beams under concentrated loads, the failure pattern, load-deformation

Keywords： flexural-torsional buckling     aluminum alloy beams (AAB)     finite element method (FEM)     theoretical formula    

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The electrostatic-alloy bonding technique used in MEMS

WANG Wei, CHEN Wei-ping

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2,   Pages 238-241 doi: 10.1007/s11465-006-0011-5

Abstract: Electrostatic-alloy bonding of silicon wafer with glass deposited by Au to form Si/Au-glass water, andwafer and glass wafer with an Au film resistor were bonded by electrostatic bonding, and then Si-Au alloy

Keywords： Si/Au-glass     strength     MEMS packaging     process     sandwich structure    

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Title Author Date Type Operation

Dual-Material Electron Beam Selective Melting: Hardware Development and Validation Studies

Chao Guo, Wenjun Ge, Feng Lin

Journal Article

A novel shape memory alloy actuated soft gripper imitated hand behavior

Journal Article

Numerical analysis of aluminum alloy reticulated shells with gusset joints under fire conditions

Journal Article

Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Journal Article

Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological

Journal Article

Advances in chemical synthesis and application of metal-metalloid amorphous alloy nanoparticulate catalysts

WU Zhijie, LI Wei, ZHANG Minghui, TAO Keyi

Journal Article

Application of cold spraying for flux-free brazing of aluminium alloy 6060

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Journal Article

Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation

Xinxiang Cao,Arash Mirjalili,James Wheeler,Wentao Xie,Ben W.-L. Jang

Journal Article

Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

Journal Article

Formic acid dehydrogenation reaction on high-performance PdAu alloy nanoparticles prepared by the eco-friendly

Journal Article

Parameter prediction in laser bending of aluminum alloy sheet

WANG Xuyue, XU Weixing, CHEN Hua, WANG Jinsong

Journal Article

Grindability of high-temperature alloy with ceramic alumina wheels

ZHANG Hongxia, CHEN Wuyi, CHEN Zhitong

Journal Article

Carbon-coated Ni-Co alloy catalysts: preparation and performance for aqueous phase hydrodeoxygenation

Journal Article

Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Journal Article

The electrostatic-alloy bonding technique used in MEMS

WANG Wei, CHEN Wei-ping

Journal Article