The Furukawa Electric Co., Ltd.

Tohoku University

Furukawa Techno Material Co., Ltd.

Koji Ishikawa

Ryosuke Kainuma

Toshihiro Omori

Sumio Kise

Toyonobu Tanaka

Misato Fujii

Kenji Nakamizo

Kiyohito Ishida

Satoshi Teshigawara

Fumiyoshi Yamashita

Shingo Kawata

Misato Nakano

Nobuyasu Matsumoto

A copper-based alloy material including a multiphase structure containing a matrix of a β phase and a precipitation phase of a B2-type crystal structure dispersed in the matrix, where the copper-based alloy material includes a composition containing 8.6 to 12.6% by mass of Al, 2.9 to 8.9% by mass of Mn, 3.2 to 10.0% by mass of Ni, and Cu.

Copper-based alloy material, production method therefor, and members or parts made of copper-based alloy material

A Cu&#x2014;Al&#x2014;Mn-based alloy material () having a composition comprising: given contents of Al and Mn, and a given total content of at least one selected from Ni and the like; with the balance being Cu and unavoidable impurities, wherein the alloy material has a shape elongated in the working direction (RD), wherein a grain length ain the RD is R/2 or less to the width or diameter (R), a grain length bin a direction perpendicular to the RD is R/4 or less, and the amount of grains X () is 15% or less, and wherein a grain length a in the RD and a grain length b in the direction perpendicular to the RD satisfy: a&#x2265;b, and an angle formed by the normal line of the (111) plane and the RD is 15&#xb0; or larger, the amount of grains Y' () is 85% or more.

Cu-Al-Mn-based alloy material, method of producing the same, and rod material or sheet material using the same

A wrought material containing a Cu&#x2014;Al&#x2014;Mn-based alloy, in which an existence frequency of a coincidence grain boundary with a &#x3a3; value of 3 or less is 35% or more but 75% or less, and which has a recrystallized microstructure substantially formed from a &#x3b2; single phase; and the use thereof.

Wrought material comprising Cu&#x2014;Al&#x2014;Mn-based alloy excellent in stress corrosion resistance and use thereof

A Cu&#x2014;Al&#x2014;Mn-based alloy having superelastic characteristics and having a recrystallized texture substantially formed of a &#x3b2; single phase, in which 70% or more of crystal grains is within a range of 0&#xb0; to 50&#xb0; in a deviation angle from &#x3c;001&#x3e; orientation of a crystalline orientation measured in a working direction by electron back-scatter diffraction patterning.

Cu&#x2014;Al&#x2014;Mn-based alloy exhibiting stable superelasticity and method of producing the same

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Hiratsuka, Japan

Koji Ishikawa