DEVELOPMENT OF HIGH STRENGTH AND HIGH CONDUCTIVITY Cu–Ag ALLOY FOR MEDICAL ULTRASOUND EQUIPMENT

2010 ◽  
Vol 17 (01) ◽  
pp. 93-97 ◽  
Author(s):  
HOON CHO ◽  
BYOUNG-SOO LEE ◽  
HYUNG-HO JO
Keyword(s):  
Heat Treatment ◽  
Electrical Conductivity ◽  
Tensile Strength ◽  
Aging Treatment ◽  
High Strength ◽  
Copper Matrix ◽  
Medical Ultrasound ◽  
High Electrical Conductivity ◽  
Aging Heat Treatment ◽  
Mechanical And Electrical Properties

The effect of thermal heat treatment on the mechanical and electrical properties of Cu–Ag alloys was investigated. The homogenization heat treatment leads to an increase in tensile strength and a decrease in electrical conductivity due to dissolution of Ag into copper matrix. Also, it is shown that electrical conductivity of as-cast Cu–Ag alloys decreases with increasing Ag content. In contrast, the aging heat treatment gives rise to increase both the tensile strength and electrical conductivity because the Ag solute diffuses out from copper matrix during aging heat treatment. Therefore, it can be mentioned that the electrical conductivity of Cu–Ag alloys depends on Ag solute in copper matrix. Also, aging treatment is favorable to acquire high strength and high electrical conductivity.

scholarly journals EFFECT OF SN COMPONENT ON PROPERTIES AND MICROSTRUCTURE CU-NI-SN ALLOYS

2018 ◽  
Vol 80 (6) ◽  
Author(s):  
D. N. Nguyen ◽  
A. T. Hoang ◽  
X. D. Pham ◽  
M. T. Sai ◽  
M. Q. Chau ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Tensile Strength ◽  
Spinodal Decomposition ◽  
Deformation Mechanism ◽  
Elastic Limit ◽  
High Strength ◽  
High Electrical Conductivity ◽  
X Ray

This paper investigates a high electrical conductivity and high strength of alloys based on Cu-Ni-Si system It proclaimed the results of the effect of tin (Sn) component on the mechanical properties and microstructure of Cu-Ni-Sn alloy. The conditions for processing the Cu-Ni-Si alloy were presented, the analysis of microstructure and mechanical properties after heat treatment was examined by X-ray, SEM, EDS and specialized machines. The results showed that with 3% mass of Sn added into the Cu-Ni-Sn alloy along with heat treatment and deformation, the hardness value reached the range of 221-240HV, the tensile strength and elastic limit reached around 1060MPa and 903MPa respectively. However, after heat treatment and deformation for the Cu-Ni-Sn alloy based on 6% mass of Sn, the hardness value reached the range of 221-318HV, the tensile strength and elastic limit were respectively 222MPa and 263MPa higher than those of the Cu-Ni-Sn alloy with 3% mass of Sn. The result from X-ray analysis showed the deflection of peaks. Nonetheless, the new phases were not observed in SEM and EDS, contrariwise, generated modular structure was considered as the proof of the Spinodal cluster. This fact might be explained by two mechanisms: deformation mechanism and Spinodal decomposition.

On-Line Aging to Improve the Tensile Strength and Conductivity of Cold-Drawing AA6201 Wires

2007 ◽  
Vol 561-565 ◽  
pp. 349-352 ◽  
Author(s):  
Tian Guo Zhou ◽  
Zheng Yi Jiang ◽  
Jing Lin Wen ◽  
A. Kiet Tieu
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Aging Treatment ◽  
High Strength ◽  
Cold Drawing ◽  
Rolling Process ◽  
Aging Heat Treatment ◽  
On Line ◽  
Structural Hardening ◽  
Better Than

AA6201 with main compositions of Mg-0.5 wt % and Si-0.5 wt %, is a typical electric conductive alloy which shows remarkable combination of high strength and high electric conductivity after heat treatment. Cold working and aging treatment process have a significant effect on its mechanical properties and conductivity. Shearing/Cooling Rolling process (SCR) was proposed to produce the feedstock for all aluminum alloy conductor. The effects of cold drawing on the properties of the alloy produced by SCR process were investigated. There are two methods used in the study, one is the cold drawing and aging heat treatment (CDAH) to produce the wires, the feedstock prepared by SCR and on-line solution, the other is the feedstock prepared by SCR and on-line solution-aging heat treatment plus cold drawing (AHCD). Results show that the AHCD can improve the properties of products due to sub-structural hardening. The tensile strength and equivalent conductivity of the alloy are 315 MPa and 55.03 % IACS respectively, and are much better than those characteristics of the alloy produced by the conventional process (295 MPa, 52.5-53.0 % IACS).

The Effects of Aging Treatment on the Strength and Conductivity of Cu-Ag-Zr-Co Alloy

2011 ◽  
Vol 695 ◽  
pp. 477-480
Author(s):  
Kyung Hun Park ◽  
Hoon Cho ◽  
Soong Keun Hyun
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Tensile Strength ◽  
Aging Treatment ◽  
High Strength ◽  
Development Trend ◽  
Coaxial Cable ◽  
High Electrical Conductivity ◽  
Transmission Electron ◽  
Effects Of Aging

The development trend for diagnostics is reducing the diameter of coaxial signal cables that comprise the probe cable. The thinner super-fine coaxial cable which is offering superior electronic and mechanical properties, such as 75 %IACS(International Annealed Copper Standard, electrical conductivity) and 700 ~ 800 MPa in tensile strength has to be developed. Cu-Ag based system is one of the most promising systems for high strength and high conductivity Cu alloys. In order to find the optimum conditions to obtain Cu-Ag-Zr-Co alloy with high strength and high electrical conductivity, the aging characteristics including work hardening of micro-Vickers hardness, tensile strength and electrical conductivity of this alloy were systematically measured at room temperature. Also the influence of aging treatment was investigated by transmission electron microscopy(TEM) and scanning electron microscopy(SEM) in this study. The aging treatment for precipitation was divided into two steps and carried out at various time and at different temperature and the multi-step aging treatment coupled with cold rolling was proposed for realizing Cu-Ag-Zr-Co alloys with high strength and high electrical conductivity. The electrical conductivity was improved from 31 %IACS to 91 %IACS remarkably and the tensile strength was increased from 230Mpa to 690Mpa greatly by an optimization of alloy composition and manufacturing process including aging.

Fabrication and Properties of a Combined Structural Cu Sheet for Interconnect Material

2010 ◽  
Vol 654-656 ◽  
pp. 2728-2731 ◽  
Author(s):  
Je Sik Shin ◽  
Hyung Kwon Moon ◽  
Bong Hwan Kim ◽  
Hyo Soo Lee ◽  
Hyouk Chon Kwon
Keyword(s):  
Electrical Conductivity ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Electrical Conduction ◽  
High Strength ◽  
High Electrical Conductivity ◽  
Conduction Path ◽  
Cu Alloy ◽  
Interconnect Material ◽  
Deep Fracture

In this study, it was aimed to develop a novel interconnect material simultaneously possessing high electrical conductivity and strength. Combined structural Cu sheets were fabricated by forming the high electrical conduction paths of Ag on the surface of high strength Cu alloy substrate by damascene electroplating. As a result, the electrical conductivity increased by 40%, while the ultimate tensile strength decreased by only 20%. When the depth of Ag conduction path was deep, fracture zone ratio as well as roll-over zone increased.

scholarly journals Effect of V Addition on Microstructure and Properties of Cu-1.6Ni-1.2Co-0.65Si Alloys

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 679
Author(s):  
Jinfeng Zou ◽  
Jianyi Cheng ◽  
Guangbo Feng ◽  
Jian Xie ◽  
Fangxin Yu
Keyword(s):  
Electrical Conductivity ◽  
High Strength ◽  
Copper Matrix ◽  
Optical Microscope ◽  
High Electrical Conductivity ◽  
Microstructure And Properties ◽  
Orowan Mechanism ◽  
Transmission Electron ◽  
Aging Response ◽  
Solute Atoms

To obtain high strength and high electrical conductivity at the same time, the microstructure and properties of 0.2 wt.% V-added, 0.1 wt.% V-added and V-free Cu-1.6Ni-1.2Co-0.65Si(-V) alloys were investigated. We examined with electrical conductivity and hardness measurements, tensile test, optical microscope and transmission electron microscope (TEM). The results show that Cu-1.6Ni-1.2Co-0.65Si-0.1V alloy obtains excellent combination properties: electrical conductivity is 46.12% IACS, hardness is 293.88 Hv, and tensile strength is 782 MPa, which are produced by 65% cold rolling + aging at 500 °C for 480 min. The addition of vanadium (V) can accelerate the precipitation of solute atoms from the copper matrix, improve the hardness and electrical conductivity of Cu-1.6Ni-1.2Co-0.65Si alloys, and greatly accelerated the aging response. δ-(Co,Ni)2Si and β-Ni3Si phases are detected in Cu-1.6Ni-1.2Co-0.65Si-0.1V alloy. The Orowan mechanism and grain boundary strengthening play a major role in the yield strength strengthening due to δ-(Co,Ni)2Si phase.

A high strength and high electrical conductivity Cu-Cr-Zr alloy fabricated by cryorolling and intermediate aging treatment

2017 ◽  
Vol 680 ◽  
pp. 108-114 ◽  
Author(s):  
Shaojian Zhang ◽  
Rengeng Li ◽  
Huijun Kang ◽  
Zongning Chen ◽  
Wei Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Aging Treatment ◽  
High Strength ◽  
High Electrical Conductivity ◽  
Zr Alloy

Effect of Stepped Aging Treatment on Microstructure and Properties of AA7085 Aluminum Alloy

2011 ◽  
Vol 228-229 ◽  
pp. 968-974 ◽  
Author(s):  
Chun Mei Li ◽  
Zhi Qian Chen ◽  
Su Min Zeng ◽  
Nan Pu Cheng ◽  
Quan Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Aging Treatment ◽  
Tensile Fracture ◽  
X Ray ◽  
Thermodynamic Factors

The effect of stepped aging treatment including two-stepped retrogression aging and retrogression reaging treatment on the mechanical properties, electrical conductivity and the microstructure of AA7085 has been investigated. Electron microscopy observations were used to analyze the microstructures and tensile fracture surfaces of AA7085 processed via various treatment schedules. Besides, X-ray diffractometer and differential scanning calorimeter were used to explore the thermodynamic factors of heat treatment. Through the investigation of the effect of the retrogression time on the properties and microstructure of AA7085, the optimized retrogression time was confirmed. The results of comparing retrogression aging and retrogression reaging treatment showed that through RRA treatment, higher conductivity and fracture toughness were gained. Through the optimized RRA treatment based on appropriate retrogression time, the tensile strength, elongation, fracture toughness and conductivity of AA7085 were raised to 660MPa, 12%,36.6MPa•m1/2and 38.1%IACS.

Manufactured Process of High Strength and High Electrical Conductivity Cu-Cr-Zr-Mg Alloy Bars

2017 ◽  
Vol 898 ◽  
pp. 1215-1219 ◽  
Author(s):  
Chun Lei Gan ◽  
Hui Liu ◽  
Kai Hong Zheng ◽  
Yu Ning Liu ◽  
Hai Yan Wang
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Precipitation Hardening ◽  
High Strength ◽  
Mg Alloy ◽  
High Electrical Conductivity ◽  
Scanning Electron ◽  
Typical Process

A typical process was developed to manufacture Cu-Cr-Zr-Mg alloy bars with high strength and high electrical conductivity. The microstructure and properties of the alloys were investigated by observations of optical microscopy and scanning electron microscopy, and measurements of tensile strength and electrical conductivity. The results showed that the process and thermo mechanical treatments were successfully developed to manufacture Cu-Cr-Zr-Mg alloy bars with good combinations of the ultimate tensile strength (602.5 MPa) and conductivity (85.4% IACS). The achievement of high strength and high electrical conductivity in the alloy could be ascribed to the interactions of strain hardening and precipitation hardening.

COPPER ALLOY No. 190

Alloy Digest ◽  
1969 ◽  
Vol 18 (9) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
High Electrical Conductivity ◽  
Endurance Strength ◽  
Hardening Heat Treatment

Abstract Copper alloy No. 190 is an intermediate strength phosphor bronze having a combination of high electrical conductivity and endurance strength. It responds to an age hardening heat treatment offering an endurance strength of 39000 psi. It is recommended for springs, conductors, fasteners, etc. where a combination of high strength, high electrical and thermal conductivity, high resistance to fatigue and creep are required. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-206. Producer or source: Copper and copper alloy mills.

A New Method of Directional Solidification of Cu-Cr Alloy

2013 ◽  
Vol 668 ◽  
pp. 804-807
Author(s):  
Lan Li ◽  
Lin Sheng Li ◽  
Chang Jun Qiu
Keyword(s):  
Electrical Conductivity ◽  
Continuous Casting ◽  
Directional Solidification ◽  
Copper Alloys ◽  
High Strength ◽  
Copper Matrix ◽  
Solidification Structure ◽  
High Electrical Conductivity ◽  
In Situ Composite

In order to meet the need of high-strength and high-electrical conductivity copper alloys in industry. A method of making high-strength and high-electrical conductivity copper alloys is discussed in this paper. This method uses the technology of heated mold continuous casting to make Cu-Cr alloy. Because it utilizes the high electrical conductivity of copper matrix and high strength of the chromium phase, the in-situ composite Cu-Cr alloy with directional solidification structure is got. The in-situ composite Cu-Cr alloy has good properties and will be widely used in industry.

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