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interface behavior of Copper and Steel by Plasma-MIG Hybrid Arc Welding

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Acta Metallurgica Sinica(English Letters) 2013年第3期26卷 328-332页

作者： Tao YANG Hongming GAO Shenghu ZHANG Lin WU State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology

Plasma-MIG hybrid arc welding is a hybrid heating source welding method which is composed of plasma arc and MIG arc. During Plasma-MIG hybrid arc welding process, the interface behavior of copper and steel dissimilar alloy is investigated. The results show that electromagnetic stirring effect decreases and the heat input increases with the increase of outer plasma current in the hybrid arc welding process. The interface diffusion and interface thickness is controlled by the tradeoff of electromagnetic stirring effect degradation and heat input increase. The interface diffusion and interface thickness are controlled by decreasing the electromagnetic stirring force and increasing the heat input with the increase of plasma current in Cu/Fe plasma-MIG hybrid arc welding process.

关键词： Plasma-MIG hybrid arc Copper-steel dissimilar alloy interface behavior

interface behavior study of WC92-Co8 coating produced by electrospark deposition

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China Welding 2004年第1期13卷 61-64页

作者：汪瑞军钱乙余刘军 State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology

ESD (electrospark deposition) is a promising process to produce hard and wear-resisting coatings on metallic substrates. In this paper microstructure and interfacial characteristics of the WC92-Co8 coated on titanium and carbon steel are presented. A metallurgical bonding between the coating and substrate is obtained. The Ti element was found to distribute in WC92-Co8 at the metal pool, as well as the interface by diffusion. Some new phases were produced in the coating layer due to the chemical reaction during the ESD process. Experimental observation and thermodynamic analysis were utilized to study the mechanism of ESD.

关键词： electrospark deposition interface behavior WC92-Co8

STUDIES ON THE INTERFACIAL ADHESION BETWEEN FUNCTIONALIZED POLYPROPYLENE AND POLYAMIDE 1010

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Chinese Journal of Polymer Science 1999年第3期17卷 237-244页

作者： Xiao-min Zhang Zhihui Yin Yongxian Song Jinghua Yin Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China 中科院长春应用化学所高分子物理及化学国家重点实验室吉林长春 130022 中科院长春应用化学所高分子物理及化学国家重点实验室吉林长春

The interface behavior of polyamide 1010 (PA1010) and polypropylene (PP) was studied. In order to improve their interfacial adhesion, functional PP was prepared by means of grafting glycidyl methacrylate (GMA) on PP main chains and used instead of plain PP. Several technological characterizations were performed here on their interfaces. ESCA was used to confirm that some kind of reaction occurred between end groups of PA1010 and epoxy species of PP-g-GMA. The peel test was adopted to measure interfacial adhesion. It was found that the fracture energy of interfaces between PA1010 and PP-g-GMA was dramatically increased with the content of GMA. Their interfaces were observed as being blurred by using SEM and TEM and a crack that could be seen in the case of the interfaces of the PA1010 and the plain PP disappeared.

关键词： polyamide 1010 polypropylene-g-GMA interface behavior adhesion

Interfacial Microstructure between WC-Based Cermet and Cu Alloy

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Journal of Materials Science & Technology 2004年第6期20卷 731-734页

作者： Xinhong WANG, Zengda ZOU, Sili SONG and Shiyao QUSchool of Materials Science and Engineering, Shandong University, Jinan 250061, China Sch. of Mat. Sci. and Eng. Shandong Univ. Jinan 250061 China

A WC-TiC-Co/CuZnNi composite layer was produced on 1045 steel substrate by means of inside-furnace brazing technique. The microstructure, phase constituent and interfacial diffusion behavior between cermet and CuZnNi alloy were investigated by means of scanning electron microscopy (SEM), transmission electron microscope (TEM), electron probe microanalyzer (EPMA) and X-ray diffraction. The results showed that microstructure of matrix was α and β phases. Cermet particies were surrounded by the α+β phases in the composite layer and their sizes were almost similar to those in original state. The interfacial zone was formed by the mutual diffusion of elements under the condition of high temperature. The interface consists of WC, TiC, CuZn, and CuNi phases, and there are no microcracks and inclusions near the interface.

关键词： Cu-base alloy WC-based cermet interface behavior Microstructure

THE INTERFACIAL behaviorS OF ALUMINUM MATRIX COMPOSITE IN DIFFERENT WELDING METHODS

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Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 55-60页

作者： W.Guo J.T.Niu J.F.Zhai G.T.Zhou M.Z.Wang State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology(HIT)Harbin150001China State Key Laboratory of Metal Matrix Composite Shanghai Jiaotong University.Shanghai 200030.China

Non-interlayer liquid phase diffusion welding (China Patent) and laser welding methods for aluminum matrix composite are mainly described in this paper. In the non-interlayer liquid phase diffusion welding, the key processing parameters affecting the strength of joint is welding temperature. When temperature rises beyond solidus temperature, the bonded line vanishes. The strength of joint reaches the maximum and becomes constant when welding temperature is close to liquid phase temperature. Oxide film in the interface is no longer detected by SEM in the welded joint. With this kind of technique, particle reinforced aluminum matrix composite Al2 O3p/6061Al is welded successfully, and the joint strength is about 80% of the strength of composite (as-casted). In the laser welding, results indicate that because of the huge specific surface area of the reinforcement, the interfacial reaction between the matrix and the reinforcement is restrained intensively at certain laser power and pulsed laser beam. The laser pulse frequency directly affects the reinforcement segregation and the reinforcement distribution in the weld, so that the weldability of the composite could be improved by increasing the laser pulse frequency. The maximum strength of the weld can reach 70% of the strength of the parent.

关键词： non-interlayer liquid phase diffusion welding Al2O3p/6061 Alaluminum matrix composite laser welding interface behavior reinforcement

Laser brazing with filler wire for galvanized steel sheets

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China Welding 2005年第1期14卷 9-14页

作者：封小松李俐群陈彦宾周善宝 State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001

The process properties and interface behavior of CO_2 laser brazing with automatic wire feed for galvanized steel sheets were investigated, in which the brazing filler metal was CuSi3 and no flux was used. As to the appearance quality of the brazing seams, the roles of the processing parameters, such as brazing speed, wire feeding rate, inclination and feeding direction of the wire, laser power, spot diameter and heating position, were assessed. The further investigation indicates that the behavior of the active elements Si, Mn and Zn are significantly influenced by energy input. At the interface, the microstructure of the base metal was composed of columnar crystals and the acicular α solid solution was found on the filler metal side.

关键词： galvanized steel sheets laser brazing with filler wire interface behavior

Effect of Initial Concentrations on Solidification of Ammonium Chloride Water Solution

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Journal of Thermal Science 1992年第4期1卷 267-271页

作者： Yuanyue Jin (1) Qijie Wang (1) Zhongqi Chen (1) 1. Department of Power Machinery Engineering Xi’an Jiaotong University 710049 Xi’an China

The effect of initial concentrations on solidification of ammonium chloride water solution is numerically investi- gated in *** solidifying process,with the cold wall temperature lower than the eutectic temperature,is assumed to be one-dimensional,and controlled by heat conduction *** simulation reveals that:(1)The solid-mush interface grows in a linear manner,while the growth rate of the mush-liquid interface decreases in a parabolic manner,with increasing initial concentrations.(2)The temperature field in the whole region has parabolic characteristics,but it shows a linear feature in the solid zone and mushy zone.(3)The concentration always has linear characteristics in the mush.(4)The solid fraction distribution is strongly affected by the ini- tial *** solidification process shows quite different features,especially at small and high initial concentrations.

关键词： solidification process ammonium chloride water solution initial concentration interface behavior

Ta_(4)HfC_(5)-Si_(2)BC_(3)N复相陶瓷的界面结构和晶粒生长行为

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Science China Materials 2023年第11期66卷 4306-4316页

作者：关景怡李达鑫周国相段文久杨治华贾德昌 Ralf Riedel 秦少华周玉 Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150000China Key Laboratory of Advanced Structural-Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China Chongqing Research Institute of HIT Chongqing 401135China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Institut für Materialwissenschaft Technische Universität DarmstadtDarmstadt D-64287Germany School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

超高温陶瓷(UHTC)Ta_(4)HfC_(5)因其优异的热物理和热机械性能而成为适用于高超音速飞行器最有前途的候选材料之一.然而,较差的烧结能力限制了其潜在的使用.为了克服该障碍,采用Si_(2)BC_(3)N陶瓷对钽-铪碳化物固溶体进行了致密化处理.... 详细信息

超高温陶瓷(UHTC)Ta_(4)HfC_(5)因其优异的热物理和热机械性能而成为适用于高超音速飞行器最有前途的候选材料之一.然而,较差的烧结能力限制了其潜在的使用.为了克服该障碍,采用Si_(2)BC_(3)N陶瓷对钽-铪碳化物固溶体进行了致密化处理.通过热压烧结合成了致密的Ta_(4)HfC_(5)-Si_(2)BC_(3)N陶瓷,所得复相陶瓷由Ta_(4)HfC_(5),SiC和BN(C)相组成.在2100℃下,随着晶粒的快速生长,陶瓷内形成了“蝌蚪”状的SiC和BN(C)连接相,断裂韧性提高到3.47±0.12 MPa m^(1/2).随着烧结温度的升高,Ta_(4)HfC_(5)晶粒的生长活化能从112.4 kJ mol^(−1)增加到250.7±29.3 kJ mol^(−1).

关键词： Ta_(4)HfC_(5)-Si_(2)BC_(3)N ceramic interface behavior growth kinetics mechanical properties

MD Study on the Interfacial behaviors of Hydrophilic/Hydrophobic Cyclic Peptide Nanotubes

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MD Study on the Interfacial Behaviors of Hydrophilic/Hydroph...