Journal of Metallurgy最新文献_第8页

A Study of the Quench Sensitivity of 6061-T6 and 6069-T6 Aluminum Alloys 6061-T6和6069-T6铝合金淬火敏感性的研究

Journal of Metallurgy Pub Date : 2011-05-19 DOI: 10.1155/2011/747198

M. E. Kassner, P. Geantil, X. Li

引用次数: 9

Theoretical Study of a Thermophysical Property of Molten Semiconductors 熔融半导体热物理性质的理论研究

Journal of Metallurgy Pub Date : 2011-04-14 DOI: 10.1155/2011/436704

Fathi Aqra, A. Ayyad

引用次数: 4

One-Dimensional Constitutive Model of Shape Memory Alloy with an Empirical Kinetics Equation 基于经验动力学方程的形状记忆合金一维本构模型

Journal of Metallurgy Pub Date : 2011-03-07 DOI: 10.1155/2011/563413

Lei Li, Qingbin Li, Fan Zhang

{"title":"One-Dimensional Constitutive Model of Shape Memory Alloy with an Empirical Kinetics Equation","authors":"Lei Li, Qingbin Li, Fan Zhang","doi":"10.1155/2011/563413","DOIUrl":"https://doi.org/10.1155/2011/563413","url":null,"abstract":"Characteristics of NiTi shape memory alloy (SMA) and its constitutive model with an empirical kinetics equation were investigated in this paper. Firstly, the transformation characters of the NiTi SMA were obtained through a differential scanning calorimetry (DSC) analysis technology, and the properties during incomplete and discontinuous transformation process and the effects of plastic deformation on the transformation were studied. The uniaxial tension, SME, and constrained recovery process of NiTi SMA were examined through an improved 10KN universal material testing machine. Experimental results indicated that the phase transformation characters and the mechanical properties could be affected by the loading process considerably, and the plastic deformation should be taken into account. To simulate the characteristics of NiTi SMA more effectively, a one-dimensional constitutive model derived from the internal variable approach with the consideration of the plastic deformation was constructed based on the DSC and the uniaxial tension experimental results, and a new simple empirical kinetics equation was presented, with the transformation temperature parameters redefined according to the DSC experiment evidence. Comparison between the numerical and experimental results indicated that this constitutive model could simulate the phase transformation characters, the uniaxial tension, SME, and the constrained recovery behavior of NiTi SMA well.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80808062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Titanium-Nickel Shape Memory Alloy Spring Actuator for Forward-Looking Active Catheter 钛镍形状记忆合金弹簧致动器前瞻主动导管

Journal of Metallurgy Pub Date : 2011-02-17 DOI: 10.1155/2011/685429

T. Namazu, M. Komatsubara, H. Nagasawa, T. Miki, T. Tsurui, S. Inoue

{"title":"Titanium-Nickel Shape Memory Alloy Spring Actuator for Forward-Looking Active Catheter","authors":"T. Namazu, M. Komatsubara, H. Nagasawa, T. Miki, T. Tsurui, S. Inoue","doi":"10.1155/2011/685429","DOIUrl":"https://doi.org/10.1155/2011/685429","url":null,"abstract":"The fabrication and characterization of forward-looking active catheter actuated by titanium-nickel (Ti-Ni) shape memory alloy (SMA) springs are described. The catheter has been designed for wide-range observation of an affected area inside a blood vessel when the blood vessel is occluded. The developed active catheter consists of eight Ti-Ni SMA spring actuators for actuation of catheter tip, an ultrasonic transducer for forward-looking, a guide wire, a polyurethane tube for coating, and spiral wirings for realization of various flexure motions of catheter tip using Ti-Ni SMA actuators. The size of the catheter is 3.5 mm in diameter and 60 mm in length of the sum of transducer and actuator sections. Ti-Ni SMA springs were fabricated from a Ti-50.9at.%Ni sheet by electrochemical etching with a mixed solution of ethanol and lithium chloride. The catheter was assembled by hand under a stereomicroscope. The tip of the produced catheter was able to move in parallel toward at least eight directions by controlling an applied current to Ti-Ni SMA springs. We have confirmed that the active catheter was able to observe an object settled in the front.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83220775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Amorphization, Crystallization, and Magnetic Properties of Melt-Spun Alloys 熔融纺丝合金的非晶化、结晶和磁性能

Journal of Metallurgy Pub Date : 2011-02-15 DOI: 10.1155/2011/910268

Liya Li, W. Xie

引用次数: 1

Process Heating and Postannealing Effects on Microstructure and Hardness of the Sputtered Ni-P-Al Coatings 工艺加热和后退火对溅射Ni-P-Al涂层显微组织和硬度的影响

Journal of Metallurgy Pub Date : 2011-01-20 DOI: 10.1155/2011/802093

Yu-Ming Su, Chia-Che Wu, F. Wu

{"title":"Process Heating and Postannealing Effects on Microstructure and Hardness of the Sputtered Ni-P-Al Coatings","authors":"Yu-Ming Su, Chia-Che Wu, F. Wu","doi":"10.1155/2011/802093","DOIUrl":"https://doi.org/10.1155/2011/802093","url":null,"abstract":"Ternary Ni-P-Al alloy coating was fabricated by magnetron sputtering technique with a Ni-P/Al composite target source. The effects of thermal treatments, including deposition process heating and postannealing, on phase transformation phenomenon and related mechanical properties were investigated. The as-deposited coatings produced under process temperature below 475∘C showed an amorphous/nanocrystalline microstructure. Significant crystallization of Ni matrix and precipitation of Ni𝑥P𝑦 and Ni𝑝Al𝑞 compounds were observed for the coatings manufactured under high sputtering temperatures above 500∘C. The amorphous Ni-P-Al coatings were postannealed from 500 to 600∘C in vacuum environment for comparison. The amorphous feature of the Ni-P-Al coating remained unchanged under a high annealing temperature of 550∘C, showing a superior thermal stability as compared to those fabricated under high process temperatures. Superior hardness was obtained for the post-annealed Ni-P-Al coatings due to volumetric constraint of crystallization and precipitation. On the other hand, the overaging phenomenon and subsequent degradation in hardness were found for the Ni-P-Al coatings fabricated under high-temperature deposition processes. The phase transformation mechanisms of the coatings through different thermal treatments were intensively discussed.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90344196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tracer Diffusion Mechanism in Amorphous Solids 示踪剂在非晶固体中的扩散机制

Journal of Metallurgy Pub Date : 2011-01-01 DOI: 10.1155/2011/861373

P. K. Hung, P. H. Kien, H. V. Hue

引用次数: 0

A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels: Impact of Martensite Content and Ferrite Grain Size 基于位错的DP钢变形硬化理论:马氏体含量和铁素体晶粒尺寸的影响

Journal of Metallurgy Pub Date : 2010-12-22 DOI: 10.1155/2010/647198

Y. Bergström, Y. Granbom, D. Sterkenburg

引用次数: 72

Temperature Control in Spark Plasma Sintering: An FEM Approach 火花等离子烧结温度控制:有限元方法

Journal of Metallurgy Pub Date : 2010-04-08 DOI: 10.1155/2010/145431

G. Molénat, L. Durand, J. Galy, A. Couret

引用次数: 64

Thermodynamic Studies of the Arsenic Adsorption on Iron Species Generated by Electrocoagulation 电凝法制备铁对砷吸附的热力学研究

Journal of Metallurgy Pub Date : 2009-11-15 DOI: 10.1155/2009/286971

J. Parga, V. Vazquez, H. Moreno

{"title":"Thermodynamic Studies of the Arsenic Adsorption on Iron Species Generated by Electrocoagulation","authors":"J. Parga, V. Vazquez, H. Moreno","doi":"10.1155/2009/286971","DOIUrl":"https://doi.org/10.1155/2009/286971","url":null,"abstract":"Protection of global environment and sustainable sources of clean water are a necessity for human survival. The wide use of heavy metals by modern industries has generated heavy metals containing wastes and by-products. Specifically, large quantities of arsenic compounds are being discharged into the environment. The full potential of Electrocoagulation (EC) with air injection as an alternative wastewater treatment technique to remove arsenic from water showed more than 99 percent of removal without adding any chemicals. This study has been carried out to determine the feasibility of arsenic adsorption on iron species by EC process using the Langmuir's Isotherm. Thermodynamic parameters such as , , and were calculated. It was found that the adsorption process is exothermic and spontaneous. Some experiments were conducted to determine the optimum operating conditions such as current density, pH, and residence time. Also in this study, X-Ray Diffraction, Scanning Electron Microscopy, Mossbauer Spectroscopy, and Fourier Transform infrared spectroscopy were used to characterize the EC solid products that revealed the expected crystalline iron oxides (lepidocrocite, magnetite, gohetite, and iron oxide).","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81583379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22