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Journal of Iron and steel Research International 2011年第S1期18卷 846-850页

作者： C.R. Killmore K.R. Carpenter H.R. Kaul D.G. Edelman J.M. Cairney s.p. ringer J.G. Williams.p.C. Campbell W.N. Blejde Bluescope steel Five Islands Road Pt Kembla 2500 Australia Nucor steel Indiana 4537 s. Nucor Rd. Crawfordsville IN 47933 USA Australian Centre for Microscopy and Microanalysis University of Sydney NSW 2006 Australia Castrip LLC1915 Rexford Rd. Charlotte NC 28211 USA

The CAsTRIp* process.p.oduces a range of high strength Ultra-thin Cast strip (UCs) products (380-550 Mpa) in thicknesses between 0.9 mm and 1.5 mm, which is very challenging to produce via conventional hot and cold rolled processing routes. The twin roll CAsTRIp process fully exploits the hardenability and strengthening potential of Nb in a low C-Mn-Nb-V microalloyed steel type. significant microstructural strengthening from solute Nb was obtained, even at low microalloying levels, as well as modest Mn additions, through enhancing the hardenability and further strengthening was obtained in coated products by exploiting age hardening during processing on a continuous hot dip galvanising line. Atom probe tomography and TEM determined that Nb was retained in solid solution and subsequent age hardening resulted from the formation of Nb and V rich nanosized particles. Age hardening was achieved without loss of ductility producing galvanised strip with an excellent strength-ductility combination (Y.s. >600 Mpa, T.E. >10%).

关键词： strip casting microalloying niobium ntom probe tomography age hardening high strength CAsTRIp process

Effect of Thermo-Mechanical processing on precipitate Formation in Next Generation HsLA steel

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Journal of Iron and steel Research International 2011年第S1期18卷 478-481页

作者： Mukherjee s Timokhina I B ringer s.p.Hodgson p D Centre for Material and Fibre Innovation Deakin UniversityGeelongVic 3217Australia Australian Key Centre for Microscopy and Microanalysis University of SydneyNSWAustralia

Development of advanced high strength steels (AHss) using a conventional rolling setup is one of the biggest challenges to steel *** has been found that fine precipitation in a soft matrix,formed after hot rolling,can markedly improve the mechanical *** this work,three dimensional atom probe tomography (3D-ApT) has been used to study the formation of precipitates in thermomechanically simulated steel.3D-ApT data reveals co-existence of numerous nano clusters with ***,quantitative analysis of the nano clusters and precipitates shows clusters are as small as 1nm in *** are found to be disc shaped with the composition of equilibrium precipitates (TiMo)***,3D-ApT is seen as an ideal technique to complement TEM to understand the nanoscale features in thermomechanically processed steel for further improvements in the mechanical properties of AHss.

关键词： TMCp 3D-ApT precipitate cluster

On the microstructure and texture evolution in 17-4 pH stainless steel during laser powder bed fusion: Towards textural design

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Journal of Materials science & Technology 2022年第22期117卷 183-195页

作者： M.s.Moyle N.Haghdadi X.Z.Liao s.p.ringer s.p.imig school of Materials science&Engineering UNSW SydneyNSW 2052Australia Australian Centre for Microscopy&Microanalysis The University of SydneyNSW 2006Australia school of Aerospace Mechanical and Mechatronic EngineeringThe University of SydneyNSW 2006Australia

Additive Manufacturing (AM) of metals allows the production of parts with complex designs, offeringadvanced properties if the evolution of the texture can be controlled. 17-4 precipitation hardening (pH)stainless steel is a high strength, high corrosion resistance alloy used in a range of industries suitable forAM, such as aerospace and marine. Despite 17-4 pH being one of the most common steels for AM, thereare still gaps in the understanding of its AM processing–structure relationships. These include the natureof the matrix phase, as well as the development of texture through AM builds under different processingconditions. We have investigated how changing the laser power and scanning strategy affects the microstructure of 17-4 pH during laser powder bed fusion. It is revealed that the matrix phase is δ-ferritewith a limited austenite presence, mainly in regions of the microstructure immediately below melt *** fraction is independent of the printing pattern and laser power. However, reducing the timebetween adjacent laser passes during printing results in an increase in the austenite volume *** effect of the higher laser power, as well as additional remelting within the printing strategy, isan increase in the average grain size by epitaxial ferrite grain growth across multiple build layers andthe development of a mosaic type microstructure. Changes to the scanning strategy have significant impacts on the textures observed along the build direction, while (100) texture along the scanning directionis observed consistently. Mechanisms for texture formation and the mosaic structure are proposed thatpresents a pathway to the design of texture via AM process control.

关键词： Additive manufacturing 17-4 pH stainless steel Microstructure Texture

微量钪对Al-2.5Cu-1.5Mg合金时效特性与微观组织的影响

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稀有金属材料与工程 2004年第8期33卷 811-814页

作者：陈志国郑子樵 ringer s p 中南大学湖南长沙410083 Australian Key Centre for Microscopy & Microanalysis The University of Sydney NSW 2006 Australia

研究了微量钪对Al-2.5Cu-1.5Mg合金微观组织与时效特性的影响。结果表明,微量钪的添加增强了Al-2.5Cu-1.5Mg合金的时效硬化效果,但并未改变该合金时效硬化的总体规律。透射电镜分析发现GpB在合金时效硬化第二阶段初期才开始析出,并且是... 详细信息

研究了微量钪对Al-2.5Cu-1.5Mg合金微观组织与时效特性的影响。结果表明,微量钪的添加增强了Al-2.5Cu-1.5Mg合金的时效硬化效果,但并未改变该合金时效硬化的总体规律。透射电镜分析发现GpB在合金时效硬化第二阶段初期才开始析出,并且是该合金第二阶段硬化的主要原因,微量钪的添加促进了Al-2.5Cu-1.5Mg合金中GpB的弥散细小析出。

关键词：铝合金时效显微组织钪

Effect of an Environmental Contaminant, Diis.p.opyl Methylphosphonate, on the Blood pressure of the Mallard

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Biomedical and Environmental sciences 1992年第4期5卷 314-320页

作者： ROss E.JONEs KATHY s.HOWELL ROBERTK.ringer DVM 8424 S. Kings Cove Dr. Salt Lake CityMichigan State University DABT Texas Instruments P.O. Box 655303 M/S 8308 Dallas TX 75265 UT 84121 E. Lansing MI 48824

During a toxicological test using diis.p.opyl methylphosphonate (DIMp) on mallards, an anaesthesia-like response was noted after oral dosing. In order to further elucidate these effects, arterial blood pressures were determined both pre-and post-dosing on adit male and female mallards by cannulation of the left carotid artery. A significant decrease in systolic, diastolic, and mean blood pressure was noted after the oral administration of DIMp. There was no significant difference in response between males and females. During the first 30 min after dosing, systolic pressure fell from an average of 158 mmHg, to 94 mmHg, diastolic decreased from 127 mmHg to 63 mmHg, and mean blood pressure dropped from 138 mmHg to 75 mmHg. However, there was no significant effect on pulse pressure, heart rate, or respiratory rate. These results are compared to physiological data cited in the literature for various CNs-acting drugs on mallards.

关键词： on the Blood pressure of the Mallard Effect of an Environmental Contaminant Diis.p.opyl Methylphosphonate

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Al-Ag-(sc)合金的时效析出行为

中国有色金属学报 2004年第F1期14卷 280-284页

作者：陈志国郑子樵 s.p.ringer 中南大学材料科学与工程学院长沙410083 悉尼大学澳大利亚微观分析国家重点实验室

通过时效硬化曲线的测量及时效组织的透射电镜分析,研究了微量钪对Al Ag合金时效析出行为的影响。研究结果表明:在Al Ag合金中添加0.2%sc(质量分数),可增强合金350℃的时效硬化效果,延长达到峰时效的时间。微观组织分析发现,微量钪的添... 详细信息

通过时效硬化曲线的测量及时效组织的透射电镜分析,研究了微量钪对Al Ag合金时效析出行为的影响。研究结果表明:在Al Ag合金中添加0.2%sc(质量分数),可增强合金350℃的时效硬化效果,延长达到峰时效的时间。微观组织分析发现,微量钪的添加促使合金中γ′相弥散细小地析出,同时钪的存在减少了γ′相宽面上的位错台阶数。含钪Al 15Ag合金中γ′相长大过程比较缓慢的微观机理是微量钪的添加影响了合金中γ′相宽面上的台阶分布。

关键词：铝合金时效微观组织钪

Feeding s.p.lemental lodine to Adult Mink;Effect on Thyroid Hormones in Adult and offspring

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Biomedical and Environmental sciences 1993年第1期6卷 81-88页

作者： RossE.JONEs RICHARDJ.AULERICH ROBERTK.ringer Texas MichiganProfessor Instrumentsm/s 81 P.O.Box655012DallasTX 75265State University Department of Animal ScienceEast LansingMI 48824Emeritus Michigan State UniversityEast LansingMI 48823USA

We fed adult mink diets containing s.p.lemental iodine, from 0 to 320 ppm, for one or seven months.p.ior to breeding. Blood samples collected from the adults and their offspring (kits) at 4 wk post-partum were assayed for total thyroxine (T4), triiodothyronine (T3), reverse T3 (rT3), and T4-binding indices. As expected T4 concentrations of the adult and kit mink varied inversely with the level of s.p.lemental iodine. In addition, T3 and rT3 concentrations decreased gradually in kits from the long-term experiment in response to the increased dietary iodine of the dams. T3 concentrations of kits from dams fed iodine short-term decreased markedly while rTy concentrations were elevated greatly in response to increased dietary iodine of the dam. These decreases in hormone levels are due to serum iodine blocking the thyroid uptake of iodine and subsequent decrease of hormone synthesis. Excess iodine may also block the effect of thyroid stimulating hormone. The T4-binding indices of the adults, in general, were depressed, while the T4-binding indices of the kits were more variable. These effects are probably due to fluctuations in thyroglobulin.

关键词： Feeding s.p.lemental lodine to Adult Mink Effect on Thyroid Hormones in Adult and offspring

Effect of Rapid Hardening on the Mechanical Behavior Ferritic Fe-C-（X） Alloys

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Effect of Rapid Hardening on the Mechanical Behavior Ferriti...

Monitoring magnesium degradation using microdialysis and fabric-based biosensors

The Fourth International Conference on physical and Numerical simulation of Materials (ICpNs’2004)

作者： p.Tran A.shekhter s.p.ringer E.V.pereloma school of physics and Materials Engineering Monash University Victoria 3800 school of physics and Materials Engineering Monash University Victoria 3800 school of physics and Materials Engineering Monash University Victoria 3800 Australian Key Centre for Microscopy and Microanalysis The University of Sydney NSW 2006.

＜正＞Low carbon ferritic steels have been researched extensively in the 1950 and 1960’s for ambient temperature structural applications. Elements such as vanadium （V）, molybdenum （Mo）, and manganese （Mn） are strong carbide formers and the precipitation of such carbides is known to strongly affect the properties of *** work aims to develop a new approach for strengthening ferrite associated with the early stages of age-hardening. The ageing behavior of four low carbon （- 0.01 wt %） ferritic steels with and without the additions of Mn, Mo and V was studied. The alloys were solution heat treated in the fully austenitic （γ） region at 1050°C for Fe-C and Fe-C-Mn and at about 1285°C for Fe-C-V and Fe-C-Mo quenched into water to produce a completely ferritic （α） matrix, then held at 700 -730℃for ferrite saturation, and subsequently aged at 550℃to facilitate substantial strengthening through precipitation hardening. Two peaks were observed on the age-hardening curve: the initial rise at 30 sec of ageing at 550℃and then a peak hardness where hardness values corresponded to approximately six times that of the as quenched values for the Fe-Cr-Mo and Fe-Cr-V steels and three times for Fe-C and Fe-C-Mn steels. The ratio between the peak hardenss values and the rapid hardness values was-3:1.A minituarised technique - shear punch testing was employed to investigate the mechanical performance of these alloys at various ageing times of significance. A technique of shear punch testing allows to utilize small amounts of material and then to correlate the results to ultimate tensile strength （UTs） and yield strength. In this study the variation of UTs, yield strength and elongation was found to be consistent in all four steels in the early stages of precipitation-hardening. An optimum combination of strength and ductility was achieved at the initial rapid-hardening stage and not at peak hardness ageing time.

关键词： Heat treatment Rapid hardening shear punch testing.

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science China Materials 2018年第4期61卷 643-651页

作者： M.su Natasha Radha s.p.Malon Dedy H.B.Wicaksono Emma p.Córcoles Hendra Hermawan Faculty of Biosciences and Medical Engineering Universiti Teknologi Malaysia Faculty of science and Technology Universiti Kebangsaan Malaysia Department of Biomedical Engineering Faculty of Life Sciences and Technology Swiss German University Instituto de Microelectrónica de Barcelona (IMB-CNM) CSIC Campus UAB Department of Mining Metallurgical and Materials Engineering & CHU de Québec Research Center

This.p.per describes the development of a monitoring system capable of detecting the concentration of magnesium ions(Mg^(2+)) released during the degradation of magnesium implants. The system consists of a microdialysis.p.obe that samples fluid adjacent to the implant and a catalytic biosensor specific to Mg^(2+)ions. The biosensor was fabricated on a cotton fabric platform, in which a mixture of glycerol kinase and glycerol-3-phosphate oxidase enzymes was immobilized on the fabric device via a simple matrix entrapment technique of the cotton fibers. pure magnesium was used as the implant material. subsequently, the concentration of ions released from the degradation of the magnesium specimen in ringer's solution was evaluated using cyclic voltammetry technique. The device demonstrated a pseudo-linear response from 0.005 to 0.1 mmol L^(-1) with a slope of 67.48 μA mmol^(-1) L. Detectable interfering species were lesser than 1%indicating a high selectivity of the fabric device. Furthermore,the device requires only 3 μL of fluid sample to complete the measurement compared to spectroscopic method(±50 μL),hence providing a higher temporal resolution and reduced sampling time. The system could potentially provide a real time assessment of the degradation behavior, a new studied aspect in biodegradable metals research.

关键词： biodegradable metal biosensor fabric device magnesium microdialysis

科莱恩开发用于甲醇合成水冷反应器的分层装填技术——MegaZonE^(TM)

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上海化工 2022年第4期47卷 105-109页

作者： s.Osborne H.schwarz N.ringer s.Reitmeier 不详

MegaZonE^(TM)是一种新推出的催化剂分层装填技术,适用于甲醇合成水冷反应器。这一新概念是液化空气工程与制造与科莱恩催化剂长期合作的最新成果之一,旨在改进甲醇工艺流程并优化整个反应器系统中的催化剂性能。科莱恩生产用于甲醇生产... 详细信息

MegaZonE^(TM)是一种新推出的催化剂分层装填技术,适用于甲醇合成水冷反应器。这一新概念是液化空气工程与制造与科莱恩催化剂长期合作的最新成果之一,旨在改进甲醇工艺流程并优化整个反应器系统中的催化剂性能。科莱恩生产用于甲醇生产(MeOH)的工业催化剂已有40多年的历史。然而,不断对催化剂性能的改进不仅仅局限于催化剂配方,而且还关注整个工艺以及催化剂如何在整个反应器系统中得到最佳利用。

关键词：反应器系统甲醇合成工业催化剂甲醇生产催化剂性能最佳利用科莱恩 Mega