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AN EXPERIMENTAL STUDY OF CO_2 LASER CUTTING OF METALLIC COATED SHEET STEELS

Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 880-885页

作者： j.wang school of mechanical, manufacturing and medical engineering, queensland university of technology, gpo box 2434, brisbane, qld. 4001, australia

An experimental investigation is outlined for the CO 2 laser cutting process of metallic coated sheet steels, GALVABOND. It shows that by proper control of the cutting parameters, good quality cuts are possible at high cutting rate. Visual examination indicates that when increasing the cutting rate to as high as 5000 mm/min (about 100 times that suggested previously), kerfs of better quality can be achieved. Some kerf characteristics such as the width, heat affected zone and dross in terms of the process parameters are also discussed. A statistical analysis has arrived at a recommendatio on the optimum cutting parameters forprocessing GALVABOND.

关键词： laser cutting sheet metal processing,metallic coated sheet steels

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THE EROSIVE PROCESS IN ABRASIVE WATERjET CUTTING OF POLYMER MATRIX COMPOSITES

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 886-890页

作者： j.wang school of mechanical, manufacturing and medical engineering, queensland university of technology, gpo box 2434, brisbane, qld. 4001, australia

A study is carried out which analyzes the machinability of polymer matrix composites under an abrasive waterjet (AWj) and the associated erosive process or mechanism. It shows that AWj cutting can produce good quality kerf at high production rate if the cutting parameters are properly selected. A scanning electron microscopy (SEM) analysis of the cut surfaces reveals that the erosive process for the matrix material (resin) involves shearing and ploughing as well as intergranular cracking, while shearing is a dominant process for cutting the fibres in the upper cutting region but the fibers are mostly pulled out in the lower region.

关键词： abrasive waterjet composite materials erosive process machinability

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Enhancing the capability and performance of abrasive waterjet cutting technology by multipass operations

Enhancing the capability and performance of abrasive waterje...

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第五届海内外青年设计与制造科学会议

作者： j.wang school of mechanical manufacturing and medical engineering queensland university of technology gpo box 2434 brisbane qld. 4001 australia

＜正＞The technique of multipass operations is introduced to abrasive waterjet （AWj） machining of engineering materials. It shows that multipass AWj cutting operations can greatly increase the capability and cutting performance （such as the smooth depth of cut and surface finish） of this technology, and hence increase its application domain to relatively thick materials and where the quality requirements are high. It is also found that multipass operation is superior to single pass cutting and requires less total cutting time than a single pass cutting in producing the same cutting performance. The study on combining the multipass cutting mode and angling the jet forward in the cutting plane has shown to be able to further enhance the capability of AWj cutting and its application domain without any additional costs to the process.

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New insights on the high-corrosion resistance of UHP Mg-Ge alloys tested in a simulated physiological environment

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journal of Magnesium and Alloys 2024年第3期12卷 1026-1044页

作者： Ting Liu Xingrui Chen jeffrey Venezuela Yuan wang Zhiming Shi Wenyi Chen Matthew Dargusch Centre for Advanced Materials Processing and manufacturing(AMPAM) School of Mechanical and Mining Engineeringthe University of QueenslandBrisbaneQLD 4072Australia CSIRO Mineral Resources 1 Technology CourtPullenvaleQLD 4069Australia

UHP Mg-Ge alloys was recently found to provide excellent corrosion *** paper provides new insights on the mechanism of improved corrosion resistance of UHP Mg-Ge alloys in Hanks’*** studied UHP Mg-0.5Ge and UHP Mg-1Ge alloys showed superior corrosion resistance compared to UHP Mg and WE43,with the Mg-1Ge exhibiting the best corrosion *** exceptional corrosion resistance of the UHP alloy is attributed to(i)Mg_(2)Ge’s ability to suppress cathodic kinetics,(ii)Ge’s capability to accelerate the formation of a highly passive layer,and the(iii)low amounts of corrosion-accelerating impurities.

关键词： UHP Mg-Ge alloy Cathodic kinetics suppression Biodegradable metals In vitro corrosion Magnesium corrosion.

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High performance flexible metal oxide/silver nanowire based transparent conductive films by a scalable lamination-assisted solution method

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journal of Materiomics 2017年第1期3卷 77-82页

作者： Hua Yu Andrew j.Stapleton David A.Lewis Lianzhou wang a Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD4072Australia Flinders Centre for NanoScale Science and technology Flinders UniversityGPO Box 2100AdelaideSA 5001Australia CSIRO Materials Science and engineering Private Bag 33Clayton SouthVictoria 3169Australia

Flexible MoO_(3)/silver nanowire(AgNW)/MoO_(3)/TiO_(2)/Epoxy electrodes with comparable performance to ITO were fabricated by a scalable solution-processed method with lamination assistance for transparent and conductive *** nanoparticle-based electrodes were also prepared for *** a simple spin-coating and lamination-assisted planarization method,a full solution-based approach allows preparation of AgNW-based composite electrodes at temperatures as low as 140℃.The resulting flexible AgNW-based electrodes exhibit higher transmittance of 82%at 550 nm and lower sheet resistance about 12-15Ωsq^(-1),in comparison with the values of 68%and 22-25Ωsq^(-1) separately for AgNP based *** electron microscopy(SEM)and Atomic force microscopy(AFM)reveals that the multi-stacked metal-oxide layers embedded with the AgNWs possess lower surface roughness(manufacturing cost,the laminationassisted solution-processed method is cost-effective and scalable,which is desire for large-area *** in view of the materials cost and comparable performance,this AgNW-based transparent and conductive electrodes is potential as an alternative to ITO for various optoelectronic applications.

关键词： Silver nanowires Transparent conductive film MoO_(3) Solution processed Lamination

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