Mechanical and Electrical Properties of Rapidly Solidified Cu-Zr-Ag Alloy Fabricated by Powder Rolling Process

2011 ◽  
Vol 1300 ◽  
Author(s):  
Satoru Miyakawa ◽  
Motonori Nishida ◽  
Nobuyuki Nishiyama ◽  
Haruko Miura ◽  
Akihisa Inoue
Keyword(s):  
Alloy Powder ◽  
Rolling Process ◽  
Alloy Sheet ◽  
Powder Rolling ◽  
Gas Atomization ◽  
Sequential Process ◽  
Argon Gas ◽  
Mechanical And Electrical Properties ◽  
Electric Connector ◽  
Rapidly Solidified

ABSTRACTA non-equilibrium Cu-Zr-Ag alloy was designed for the development of an alternative electric connector to Cu-Be alloys. This work aims at producing a Cu-Zr-Ag sheet using a hot-powder-rolling (HPR) process. The sheets were produced by a sequential process of HPR, pre-annealing, and cold rolling, using Cu93.5Zr5.5Ag1 (at.%) alloy powder produced by an argon gas atomization method. The Cu93.5Zr5.5Ag1 alloy sheet has a tensile strength of 1188 MPa and a conductivity of 33.2% IACS, which are similar values to those of Cu-Be alloys. In this paper, we optimize the conditions of the HPR process and reveal the correlation between the microstructure and properties of the Cu-Zr-Ag sheet produced by the HPR process. In addition, we discuss the alloy’s applicability for use as a connecter material.

Microstructure and properties of Cu-Cr-Nb alloy powder prepared by argon gas atomization

2019 ◽  
Vol 30 (11) ◽  
pp. 2464-2472
Author(s):  
Xueqian Lv ◽  
Zuming Liu ◽  
Ting Lei ◽  
Quan Li ◽  
Fan Zhao ◽  
...  
Keyword(s):  
Alloy Powder ◽  
Gas Atomization ◽  
Argon Gas ◽  
Microstructure And Properties

Shock consolidation of Ni-Ti alloy powder

1986 ◽  
Vol 44 ◽  
pp. 430-431
Author(s):  
Naresh N. Thadhani ◽  
Thad Vreeland ◽  
Thomas J. Ahrens
Keyword(s):  
Alloy Powder ◽  
Amorphous Material ◽  
Ti Alloy ◽  
Two Phase ◽  
Near Surface ◽  
Optical Micrograph ◽  
Shock Compaction ◽  
Powder Particles ◽  
Ti Powder ◽  
Rapidly Solidified

A spherically-shaped, microcrystalline Ni-Ti alloy powder having fairly nonhomogeneous particle size distribution and chemical composition was consolidated with shock input energy of 316 kJ/kg. In the process of consolidation, shock energy is preferentially input at particle surfaces, resulting in melting of near-surface material and interparticle welding. The Ni-Ti powder particles were 2-60 μm in diameter (Fig. 1). About 30-40% of the powder particles were Ni-65wt% and balance were Ni-45wt%Ti (estimated by EMPA).Upon shock compaction, the two phase Ni-Ti powder particles were bonded together by the interparticle melt which rapidly solidified, usually to amorphous material. Fig. 2 is an optical micrograph (in plane of shock) of the consolidated Ni-Ti alloy powder, showing the particles with different etching contrast.

Study on the Microstructure and Texture of Warm Rolled ZK60 Magnesium Alloy Sheet

2012 ◽  
Vol 557-559 ◽  
pp. 1344-1348
Author(s):  
Hong Mei Chen ◽  
Hua Shun Yu ◽  
Guang Hui Min ◽  
Yun Xue Jin
Keyword(s):  
Shear Bands ◽  
Rolling Direction ◽  
Rolling Process ◽  
Warm Rolling ◽  
Alloy Sheet ◽  
Rolling Temperature ◽  
Rolling Reduction ◽  
Basal Pole ◽  
Zk60 Alloy ◽  
Twin Roll

The microstructure and macrotexture of ZK60 alloy sheet were investigated through OM and XRD, which were produced by twin roll casting and sequential warm rolling. Microstructure of twin roll cast ZK60 alloy changed from dendrite structure to fibrous structure with elongated grains and high density shear bands along the rolling direction after warm rolling process at different rolling parameters. The density of shear bands increased with the decreasing of the rolling temperature, or the increasing of per pass rolling reduction. Dynamic recrystallization could be found during the warm rolling process at and above 350oC, and many fine grains could be found in the shear band area. The warm rolled ZK60 alloy sheet exhibited strong (0001) basal pole texture. The formation of the shear bands tends to cause the basal pole tilt slightly to the transverse direction after warm rolling. The intensity of (0001) pole figure increased with the decreasing of rolling temperature, or the increasing of per pass rolling reduction.

Advanced gas atomization processing for Ti and Ti alloy powder manufacturing

JOM ◽  
2010 ◽  
Vol 62 (5) ◽  
pp. 35-41 ◽  
Author(s):  
A. J. Heidloff ◽  
J. R. Rieken ◽  
I. E. Anderson ◽  
D. Byrd ◽  
J. Sears ◽  
...  
Keyword(s):  
Alloy Powder ◽  
Gas Atomization ◽  
Ti Alloy ◽  
Powder Manufacturing

scholarly journals Properties of Rapidly Solidified TiN Powder Produced by Reactive Gas Atomization Process Using Laser.

1995 ◽  
Vol 111 (13) ◽  
pp. 955-960
Author(s):  
Yasuhiro TSUGITA ◽  
Hideki HUKUHARA ◽  
Yoshiaki YAMANAKA ◽  
Minoru NISHIDA ◽  
Takao ARAKI
Keyword(s):  
Gas Atomization ◽  
Atomization Process ◽  
Rapidly Solidified ◽  
Reactive Gas

scholarly journals Characteristics of Hydrogen Storage Alloy Powder Prepared by Ar gas Atomization Process

Materia Japan ◽  
1997 ◽  
Vol 36 (2) ◽  
pp. 104-108 ◽  
Author(s):  
Hideya Kaminaka ◽  
Yoshiaki Shida ◽  
Kouichi Koushiro
Keyword(s):  
Hydrogen Storage ◽  
Alloy Powder ◽  
Hydrogen Storage Alloy ◽  
Gas Atomization ◽  
Atomization Process ◽  
Ar Gas

Densification Behavior of Titanium in Direct Powder Rolling Process

2012 ◽  
Vol 36 (10) ◽  
pp. 1255-1260 ◽  
Author(s):  
Dong-Hwan Kang ◽  
Jae-Keun Hong ◽  
Nho-Kwang Park ◽  
Tae-Won Kim
Keyword(s):  
Rolling Process ◽  
Powder Rolling ◽  
Densification Behavior

scholarly journals Recrystallization Microstructure Prediction of a Hot-Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method

2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Ming Chen ◽  
Xiaodong Hu ◽  
Hongyang Zhao ◽  
Dongying Ju
Keyword(s):  
Flow Stress ◽  
Magnesium Alloy ◽  
Cellular Automata ◽  
Process Analysis ◽  
Rolling Process ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Rolled Sheet ◽  
Element Analysis ◽  
Hot Rolled

A large reduction rolling process was used to obtain complete dynamic recrystallization (DRX) microstructures with fine recrystallization grains. Based on the hyperbolic sinusoidal equation that included an Arrhenius term, a constitutive model of flow stress was established for the unidirectional solidification sheet of AZ31 magnesium alloy. Furthermore, discretized by the cellular automata (CA) method, a real-time nucleation equation coupled flow stress was developed for the numerical simulation of the microstructural evolution during DRX. The stress and strain results of finite element analysis were inducted to CA simulation to bridge the macroscopic rolling process analysis with the microscopic DRX activities. Considering that the nucleation of recrystallization may occur at the grain and R-grain boundary, the DRX processes under different deformation conditions were simulated. The evolution of microstructure, percentages of DRX, and sizes of recrystallization grains were discussed in detail. Results of DRX simulation were compared with those from electron backscatter diffraction analysis, and the simulated microstructure was in good agreement with the actual pattern obtained using experiment analysis. The simulation technique provides a flexible way for predicting the morphological variations of DRX microstructure accompanied with plastic deformation on a hot-rolled sheet.

Confined Gas Atomization: The Role of the Melt Delivery Tube in Particle Size Control

1986 ◽  
Vol 80 ◽  
Author(s):  
R. V. Raman
Keyword(s):  
Unique Feature ◽  
Size Control ◽  
Lower Surface ◽  
Spherical Particles ◽  
Gas Atomization ◽  
Reactive Elements ◽  
Delivery Tube ◽  
Atomization Process ◽  
Rapidly Solidified

AbstractGas atomization is one of the key processes used for the production of rapidly solidified materials. The unique feature of the gas atomization process is its capability to form spherical powders of multicomponent alloys containing reactive elements. Spherically shaped powder is specified in the secondary processing operations used in a number of applications. This requirement has resulted from the higher flow rate, better packing density, and lower surface area obtained in spherical particles compared to irregularly shaped particles.

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