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journal of Iron and Steel Research International 2011年第S1期18卷 233-237页

作者： Muszka Krzysztof Wynne Bradley P palmiere eric j Institute for Microstructural and Mechanical Process Engineering The University of SheffieldMappin StreetSheffield S1 3JDUK

The effects of large strain and strain path reversal on the deformation microstructure evolution in austenite below the recrystallisation temperature were studied by hot torsion using a non-transforming Fe-30wt%Ni model austenitic *** show that the high angle boundaries (HABs) can be generated by both microstructure mechanism through dislocation accumulation and texture mechanism via subgrain ***,multiple strain path reversals lead to less well-developed HABs in the original grains compared to single reversal deformed to the same amount of total accumulative *** effect is attributed to the subgrain rotation mechanism being less effective at small *** comparison,the same hot torsion tests were conducted using a microalloyed steel at a temperature between Ae 3 and Ar *** single strain path reversal,substantial deformation-induced austenite-to-ferrite phase transformation was ***,a test with multiple strain path reversals but with the same total strain produces much lower levels of strain-induced ferrite *** difference is correlated to the observations made in the Fe-30wt%Ni model *** is believed that the different amount of strain-induced ferrite originated from the different levels of strain-induced HABs within the austenite which act as ferrite nucleation sites.

关键词： strain induced transformation ultra fine ferrite dislocation boundaries EBSD

Effect of Cooling Rate on the Room Temperature Microstructure Following the Intercritical Deformation of Steel S460

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journal of Iron and Steel Research International 2011年第S1期18卷 500-505页

作者： Hinton john S palmiere eric j Rainforth W.Mark IMMPETUS Dept.Of Materials Science and EngineeringThe University of SheffieldMappin StSheffieldSouth YorkshireS1 3JDUK

The effect of final hot rolling in the intercritical (α+γ) region on microstructure and properties is very specific to the individual processing conditions and the chemical composition of a steel.S460 is a plate steel processed in this *** reproduce at the laboratory scale,a multi-stage simulation was developed which included a high temperature austenite deformation and an isothermal *** effect of the applied cooling rate following intercritical deformation was *** 1K/s (typical industrial cooling) the microstructure was similar to the reference sample,but included an intragranular ferrite *** was due to differences in processing history,and considered to be linked to a larger prior austenite grain *** an accelerated cooling rate (15K/s),acicular ferrite formed on shear bands within the strained austenite *** scans have been completed to provide further information about the microstructures,with band contrast able to identify the pearlite phase at the slowest cooling *** is a starting point from which to focus on the ferrite morphologies.

关键词： intercritical deformation cooling rate laboratory simulation plate steel acicular ferrite

Effect of Cooling Rate on the Room Temperature Microstructure Following the Intercritical Deformation of Steel S460

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Effect of Cooling Rate on the Room Temperature Microstructur...

Microstructural evolution of a heat-treated H23 tool steel

第六届国际低合金高强度钢会议

作者： Hinton john S palmiere eric j Rainforth W.Mark IMMPETUS Dept.Of Materials Science and EngineeringThe University of SheffieldMappin StSheffieldSouth YorkshireS1 3JDUK

＜正＞The effect of final hot rolling in the intercritical（α+γ） region on microstructure and properties is very specific to the individual processing conditions and the chemical composition of a steel.S460 is a plate steel processed in this *** reproduce at the laboratory scale,a multi-stage simulation was developed which included a high temperature austenite deformation and an isothermal *** effect of the applied cooling rate following intercritical deformation was *** 1 K/s（typical industrial cooling） the microstructure was similar to the reference sample,but included an intragranular ferrite *** was due to differences in processing history,and considered to be linked to a larger prior austenite grain *** an accelerated cooling rate（15K/s）,acicular ferrite formed on shear bands within the strained austenite *** scans have been completed to provide further information about the microstructures,with band contrast able to identify the pearlite phase at the slowest cooling *** is a starting point from which to focus on the ferrite morphologies.

关键词： intercritical deformation cooling rate laboratory simulation plate steel acicular ferrite

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cnki会议

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International journal of Minerals,Metallurgy and Materials 2015年第3期22卷 272-284页

作者： Meilinda Nurbanasari Panos Tsakiropoulos eric j.palmiere Department of Mechanical Engineering Institut Teknologi Nasional Department of Materials Science and Engineering The University of Sheffield

The microstructure and the stability of carbides after heat treatments in an H23 tool steel were investigated. The heat treatments consisted of austenization at two different austenizing temperatures （1100℃ and 1250℃）, followed by water quenching and double-aging at 650℃, 750℃, and 800℃with air cooling between the first and second aging treatments. Martensite did not form in the as-quenched micro- structures, which consisted of a ferrite matrix, M6C, M7C3, and MC carbides. The double-aged microstructures consisted of a ferrite matrix and MC, M6C, M7C3, and M23C6 carbides. Secondary hardening as a consequence of secondary precipitation of fine M2C carbides did not occur. There was disagreement between the experimental microstructure and the results of thermodynamic calculations. The highest double-aged hardness of the H23 tool steel was 448 HV after austenization at 1250℃ and double-aging at 650℃, which suggested that this tool steel should be used at temperatures below 650℃.

关键词： tool steel microstruc^ral evolution heat treatment carbides stability hardness

Microstructure Evolution as an Effect of Strain Reversal During the Hot Deformation of Microalloyed Steels

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journal of Iron and Steel Research International 2011年第S1期18卷 213-217页

作者： Muszka Krzysztof palmiere eric Majta janusz AGH University of Science and Technology Mickiewicza 3030-059 KrakowPoland IMMPETUS University of SheffieldMappin St.S1 3JD SheffieldUnited Kingdom

Susceptibility of the steel for further cold processing strongly depends on the whole prior history of deformation in the hot working *** the industrial hot working processes,*** the roughing stage of hot rolling,or forging,material undergoes complex deformation modes that leads to gradients of both microstructure and properties across the deformed *** and multiaxial compression tests with different amounts of strain reversals were conducted at elevated temperatures to study the effect of applied strain path on the phenomena occurring during microstructure evolution of Nb-microalloyed *** results will provide data for the modification of existing constitutive equations that mostly do not account for the strain path *** through-process modelling will then enable to achieve better properties and quality of the products for further cold processing.

关键词： strain reversal strain path history microstructure microalloyed steel

Gαq takes centre stage in multiple sclerosis pathogenesis

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Cellular & Molecular Immunology 2017年第5期14卷 401-402页

作者： eric j Downer School of Medicine Discipline of PhysiologyTrinity Biomedical Sciences Institute Trinity Col-lege Dublin Dublin 2 Ireland

There is no cure for multiple sclerosis （MS）; however, a number of strategies exist for disease management, including medications that reduce the frequency of relapses and long-term accrual of disability.1 However, the fact that MS therapies can be partially effective and have the risk of side effects, in addition to the observation that disability often continues to worsen despite immunotherapy, has highlighted the need for novel therapeutic targets in the disease.

关键词： Gαq centre stage multiple sclerosis

Chromate and selenate hydrocalumite solid solutions and their applications in waste treatment

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维普期刊数据库

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Science China(Life Sciences) 2005年第z1期48卷 165-173页

作者： eric j. Reardon Department of Earth Sciences University of Waterloo Waterloo Ontario Canada N2L 3G1

Hydrocalumite, a calcium aluminate hydrate phase, consists of positively-charged structure units, and is therefore an ideal candidate for accommodating anionic contaminants. In this study, a series of batch experiments was carried out to examine the uptake of chromate and selenate by hydrocalumite. To determine the uptake capacity and long-term stability, hydrocalumite solid solutions between chromate/selenate and hydroxyl were synthesized over a reaction time of more than one year. At a ratio of water to initial solids added (CaAl2O4+CaO) of 75: 1, the maximum uptake capacities were over 77 and 114 g/kg for Cr and Se, *** values are very close to the theoretical uptake capacities of chromate and selenate hydrocalumite end-members (81 and 118 g/kg, respectively). The oxyanion removal efficiency from solution was above 95%. Due to the high uptake capacity and anion removal efficiency of hydrocalumites, their application in wastewater treatment is promising. Hydrocalumites are also important hydration products of cementitious materials and the long-term stability of these phases is of significance for application in solidification/stabilization technology.

关键词： chromate, selenate, hydrocalumite, uptake capacity, stability.

Effects of pH on rheological characteristics and stability of petroleum coke water slurry

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Petroleum Science 2016年第4期13卷 782-787页

作者： Fu-Yan Gao eric-j.Hu Ningbo Institute of Technology Zhejiang University School of Mechanical Engineering University of Adelaide

In this study, the effects of pH on slurrying properties of petroleum coke water slurry（PCWS） were investigated. The slurrying concentration, rheological characteristics and stability of PCWS were studied with four different types of additives at pH varying from 5 to *** results showed that the slurrying concentration, rheological characteristics and stability of PCWS all increased at first and then decreased with increasing pH from 5 to 11,and a pH of around 9 was found to be the most favorable acid–alkali environment to all these three slurrying properties. It was also indicated that only in a moderate alkaline environment can the additives be active enough to react with particle surfaces sufficiently to obtain good slurrying concentration and form a stable three-dimensional network structure, which can support strong pseudoplastic characteristics and good stability. An acid environment was a very unfavorable factor to the slurrying properties of PCWS.

关键词： Petroleum coke Petroleum coke water slurry pH Slurrying concentration Rheological characteristics Stability

Inherent relations between yield stress and stability of bubble petroleum coke water slurry

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Petroleum Science 2018年第1期15卷 157-163页

作者： Fu-Yan Gao eric j.Hu Ningbo Institute of Technology Zhejiang University School of Mechanical Engineering The University of Adelaide

The stability of petroleum coke water slurry（PCWS） is currently a hot topic. The inherent relationship between yield stress and stability of bubble-PCWS was studied through orthogonal experiments and range analysis in this work. The results showed that the stability of bubble-PCWS was positively related to the yield stress and that the yield stress could be greatly impacted by the operation conditions during preparation of bubble-PCWS. The main factors affecting the yield stress of bubble-PCWS were solid concentration, aeration time and dosage of frother. However, the effects of aperture size of air distribution plates and type of frother on the yield stress were slight within the experimental range. The optimal conditions for the greatest yield stress were as follows： aeration time of 30 min, solid concentration of 65 wt%, frother dosage of0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2-5 lm and AOS *** yield stress and the pour rate of bubble-PCWS under this optimum operation condition could reach maxima of more than 0.4 Pa and 96%, respectively.

关键词： Petroleum coke Petroleum coke water slurry (PCWS) Stability Yield stress Orthogonal experiment

An ensemble method for gene discovery based on DNA microarray data

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Science China(Life Sciences) 2004年第5期47卷 396-405页

作者： Kathy L. MOSER eric j. TOPOL Department of Medicine Institute of Human Genetics University of Minnesota Minnesota 55455 USA Center for Cardiovascular Genetics Department of Cardiovascular Medicine the Cleveland Clinic Foundation 9500 Euclid Avenue Cleveland Ohio 44195 USADepartment of Molecular Cardiology the Cleveland Clinic Foundation 9500 Euclid Avenue Cleveland Ohio 44195 USA

The advent of DNA microarray technology has offered the promise of casting new insights onto deciphering secrets of life by monitoring activities of thousands of genes simulta-neously. Current analyses of microarray data focus on precise classification of biological types, for example, tumor versus normal tissues. A further scientific challenging task is to extract dis-ease-relevant genes from the bewildering amounts of raw data, which is one of the most critical themes in the post-genomic era, but it is generally ignored due to lack of an efficient approach. In this paper, we present a novel ensemble method for gene extraction that can be tailored to fulfill multiple biological tasks including (i) precise classification of biological types; (ii) disease gene mining; and (iii) target-driven gene networking. We also give a numerical application for (i) and (ii) using a public microarrary data set and set aside a separate paper to address (iii).

关键词： microarrays,ensemble decision,recursive partition tree,feature gene selection.