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Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 48-52 doi: 10.1007/s11465-018-0493-y

Abstract: The first, second, and third parts were produced by low-pressure die casting (Al-12Si-0.8Cu-0.5Fe-0.9Mg-0.7Ni-0.2Zn alloy), die casting (A356, Al-7Si-0.3Mg), and semi-solid casting (A356, Al-7Si-0.3Mg), respectivelyUnlike die casting (second part), low-pressure die casting (first part) significantly reduced the formationof casting defects (i.e., porosity) due to its smooth filling and solidification under pressure.semi-solid casting could produce high-quality near-net shape casting aluminum parts.

Keywords： near-net shape casting aluminum parts casting defects low pressure die casting die casting semi-solidcasting computed tomography

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Interfacial heat transfer coefficient between metal and die during high pressure die casting process

GUO Zhipeng, XIONG Shoumei, CHO SangHyun, CHOI JeongKil

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 283-287 doi: 10.1007/s11465-007-0049-z

Abstract: focused on the determination of the interfacial heat transfer coefficient (IHTC) between metal and dieduring the high pressure die casting (HPDC) process.Experiments were carried out on an aluminum alloy, ADC12Z, using step shape casting so-called becauseCasting thickness played an important role in affecting the IHTC between the metal and die not only intendencies of the metal solid fraction were found between castings with different thicknesses and the die

Keywords： so-called calculation inverse interfacial aluminum

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Novel technologies for the lost foam casting process

Wenming JIANG, Zitian FAN

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 37-47 doi: 10.1007/s11465-018-0473-2

Abstract:

Lost foam casting (LFC) is a green precision casting process categorized as a near net forming technologymechanical properties for the Al and Mg LFC processes, and defective carburization for the low carbonpressure, vibration solidification, and pressure solidification conditions; expendable shell castingThe results showed that the LFC under vacuum and low pressure evidently improved the filling abilityThe vibration and pressure solidifications increased the compactness of the castings and refined the

Keywords： LFC under vacuum and low pressure vibration solidification pressure solidification expendable shell casting

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An energy consumption prediction approach of die casting machines driven by product parameters

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4, Pages 868-886 doi: 10.1007/s11465-021-0656-0

Abstract: Die casting machines, which are the core equipment of the machinery manufacturing industry, consume greatThe energy consumption prediction of die casting machines can support energy consumption quota, processNevertheless, due to the uncertainty and complexity of the energy consumption in die casting machinesTo fill this gap, this paper proposes an energy consumption prediction approach for die casting machinesConsequently, a systematic energy consumption prediction approach for die casting machines, involving

Keywords： die casting machine energy consumption prediction product parameters

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Ultrasonic measurement of tie-bar stress for die-casting machine

Frontiers of Mechanical Engineering doi: 10.1007/s11465-021-0663-1

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Industrialization of the Advanced Technology in Continuous Casting of Steel

Gan Yong

Strategic Study of CAE 2002, Volume 4, Issue 9, Pages 12-18

Abstract:

The characteristics of key technology in high-effective and thin-slab continuous casting of steelsuch as soft reduction, hydraulic-driven non-sinusoidal oscillation, and electromagnetic continuous castingThe progress direction of high-efficiency and high quality of conventional continuous casting is discussed, and the development trend of near-net-shape continuous casting and electromagnetic continuous casing

Keywords： continuous casting of steel high-effective continuous casting thin slab continuous casting soft reduction electromagnetic continuous casting industrialization

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Theoretical study of failure in composite pressure vessels subjected to low-velocity impact and internalpressure

Roham RAFIEE, Hossein RASHEDI, Shiva REZAEE

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6, Pages 1349-1358 doi: 10.1007/s11709-020-0650-3

Abstract: aimed to be developed in this research for predicting the failure in internally pressurized composite pressurevessels exposed to low-velocity impact.For this purpose, layer-wise theory is employed in a composite cylinder under internal pressure and low-velocity

Keywords： composite pressure vessel low-velocity impact failure theoretical solution progressive damage modeling

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Ionic strength directed self-assembled polyelectrolyte single-bilayer membrane for low-pressure nanofiltration

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5, Pages 699-708 doi: 10.1007/s11705-021-2093-3

Abstract: ∙h^–1∙bar^–1 and Na₂SO₄ rejection of 97.1% ± 0.8% under a lowapplied pressure of 1 bar.

Keywords： layer-by-layer self-assembly single bilayer nanofiltration membrane desalination

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Using mRNA to investigate the effect of low-pressure ultraviolet disinfection on the viability of

Chao Yang, Wenjun Sun, Xiuwei Ao

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1111-x

Abstract:

UV can induce damages on mRNA consistently among different genes.

SOS response was more active after UV treatment.

Programmed cell death was not found to be more active after UV treatment.

Keywords： UV disinfection Viability mRNA SOS response Programmed cell death

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Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2, Pages 209-225 doi: 10.1007/s11705-017-1688-1

Abstract: by most of world population and the consequent increasing demand for energy are making unexploited lowIn this work, a new process for the purification of natural gas based on a low temperature distillation

Keywords： CO₂ capture innovative process cryogenic distillation dynamic simulation solid-liquid-vapor equilibrium

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Catalytic ozonation of reactive red X-3B in aqueous solution under low pressure: decolorization and OH

Hong SUN,Min SUN,Yaobin ZHANG,Xie QUAN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4, Pages 591-595 doi: 10.1007/s11783-014-0694-5

Abstract: The operating variables such as reaction pressure and ozone supply had a positive influence on the degradation

Keywords： catalytic ozonation reactive red X-3B ceramic honeycomb hydroxyl radical (OH·)

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Novel casting processes for single-crystal turbine blades of superalloys

Dexin MA

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 3-16 doi: 10.1007/s11465-018-0475-0

Abstract:

This paper presents a brief review of the current casting techniques for single-crystal (SC) bladesA series of novel casting methods based on the Bridgman process were presented to illustrate the development

Keywords： superalloy investment casting Bridgman process directional solidification single crystal turbine blade

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Spray characteristics of high-pressure swirl injector fueled with alcohol

WANG Xibin, CHEN Wansheng, GAO Jian, JIANG Deming, HUANG Zuohua

Frontiers in Energy 2007, Volume 1, Issue 1, Pages 105-112 doi: 10.1007/s11708-007-0012-z

Abstract: The spray characteristics of methanol and ethanol with high-pressure swirl injector were explored experimentallyUnder the low back-pressure ambient conditions, the spray behavior exhibited a hollow cone with wideVortexes in the opposite direction existed in the rear part of the spray under low back-pressure ambientThe SMD profile of methanol coincided well with that of ethanol under low back-pressure ambient conditions, but displayed a slightly larger value under high back-pressure due to fuel evaporation.

Keywords： low back-pressure diameter initial spray hollow middle

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Hybrid forming mechanism of patternless casting and laser cladding

Zhongde SHAN, Fuzhen SUN, Yang LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4, Pages 393-401 doi: 10.1007/s11465-019-0550-1

Abstract: The method combines digital patternless casting and high-power laser cladding.

Keywords： patternless casting laser cladding hybrid forming rapid tooling

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Separation of

Wei Hou, Qingjun Zhang, Aiwu Zeng

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5, Pages 1169-1184 doi: 10.1007/s11705-020-2018-6

Abstract: study, vapor recompression and heat integration assisted distillation arrangements with either the lowor high pressure in the reflux drum are proposed to reduce and/or eliminate the application of the costlyThe high-pressure arrangement with vapor recompression and heat integration is the most attractive amongThe results demonstrate that the high-pressure configuration presents unique advantages in terms of thermodynamicefficiency compared to the low-pressure case.

Keywords： n-heptane/isobutanol vapor recompression heat integration low and/or high-pressure options