Japan Science and Technology Agency

Tohoku University

Other

The Furukawa Electric Co., Ltd.

Furukawa Techno Material Co., Ltd.

Terumo Kabushiki Kaisha

Honda Motor Co., Ltd.

National Institute of Advanced Industrial Science and Technology

Ryosuke Kainuma

Kiyohito Ishida

Toshihiro Omori

Yuji Sutou

Ikuo Ohnuma

Kiyoshi Yamauchi

Sumio Kise

Toyonobu Tanaka

Koji Ishikawa

Yuuki Tanaka

Jun Sato

Katsunari Oikawa

Misato Fujii

Kenji Nakamizo

Hiraku Murayama

Yoshikazu Ishii

Katunari Oikawa

Ryouichi Souba

Masahiro Ohta

Toru Sukigara

Satoshi Teshigawara

Yoshikazu Takaku

Fumiyoshi Yamashita

Shingo Kawata

Yuji Sutoh

Takehito Hagisawa

Nobuyasu Matsumoto

Toshihiro Ohmori

Takeshi Kanomata

Akira Ogawa

Keisuke Ando

Misato Nakano

Yuki Noguchi

Noguchi Yuki

Masahito Hatori

Kiyogito Ishida

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 Fe-based shape memory alloy material, containing 25 atom % to 42 atom % of Mn, 9 atom % to 13 atom % of Al, 5 atom % to 12 atom % of Ni, and 5.1 atom % to 15 atom % of Cr, with the balance being Fe and unavoidable impurities; a method of producing the same; and a wire material and sheet material composed of the alloy material.

Fe-based shape memory alloy material and method of producing 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

A hydrogen gas generating member includes a metal alloy having dispersed aluminum. The metal alloy includes an Al&#x2014;X alloy, where X is Sn: 10.1 to 99.5% by mass, Bi: 30.1 to 99.5% by mass, In: 10.1 to 99.5% by mass, Sn +Bi: 20.1 to 99.5% by mass, Sn +In: to 10 to 99.5% by mass, Bi+In: 20.1 to 99.5% by mass, or Sn+Bi+In: 20 to 99.5% by mass. Hydrogen gas is generated by bringing the hydrogen gas generating member into contact with water.

Hydrogen gas generating member and hydrogen gas producing method therefor

A process for producing a Co-base alloy which has a basic composition including, in terms of mass proportion, 0.1%-10% Al, 3.0-45% W, and Co as the remainder and has an intermetallic compound of the L1type [Co(Al,W)] dispersed and precipitated therein. Part of the Co may be replaced with Ni, Ir, Fe, Cr, Re, or Ru, while part of the Al and W may be replaced with Ni, Ti, Nb, Zr, V, Ta or Hf. The intermetallic compound [Co(Al, W)] has a high melting point, and this compound and the matrix are mismatched little with respect to lattice constant. Thus, the cobalt-base alloy can have high-temperature strength equal to that of nickel-base alloys and excellent structure stability.

Cobalt-base alloy with high heat resistance and high strength and process for producing the same

An Fe-based shape memory alloy comprising 25-42 atomic % of Mn, 12-18 atomic % of Al, and 5-12 atomic % of Ni, the balance being Fe and inevitable impurities, and an Fe-based shape memory alloy comprising 25-42 atomic % of Mn, 12-18 atomic % of Al, and 5-12 atomic % of Ni, as well as 15 atomic % or less in total of at least one selected from the group consisting of 0.1-5 atomic % of Si, 0.1-5 atomic % of Ti, 0.1-5 atomic % of V, 0.1-5 atomic % of Cr, 0.1-5 atomic % of Co, 0.1-5 atomic % of Cu, 0.1-5 atomic % of Mo, 0.1-5 atomic % of W, 0.001-1 atomic % of B and 0.001-1 atomic % of C, the balance being Fe and inevitable impurities.

Fe-based shape memory alloy and its production method

A guide wire includes a distal core member made of a ferrous alloy which has shape memory properties and superelasticity. The ferrous alloy preferably includes substantially two phases, and has a difference of 100&#xb0; C. or less between an Af point and an Ms point in a thermal hysteresis of martensitic transformation and reverse transformation. The guide wire may include a proximal core member made of an iron-containing alloy and having a higher modulus of elasticity than the distal core member. The two core members may be joined together by welding to form a core of the guide wire.

Guide wire and stent

A Co-base alloy which has a basic composition including, in terms of mass proportion, 0.1%-10% Al, 3.0-45% W, and Co as the remainder and has an intermetallic compound of the Lltype [Co(Al,W)] dispersed and precipitated therein. Part of the Co may be replaced with Ni, Ir, Fe, Cr, Re, or Ru, while part of the Al and W may be replaced with Ni, Ti, Nb, Zr, V, Ta or Hf. The intermetallic compound [Co(Al, W)] has a high melting point, and this compound and the matrix are mismatched little with respect to lattice constant. Thus, the cobalt-base alloy can have high-temperature strength equal to that of nickel-base alloys and excellent structure stability.

A Co-based alloy being useful as a spiral spring, common spring, wire, cable guide, steel belt, build-up material, guide wire, stent, catheter, etc. There is provided a Co-based alloy having a composition of Co&#x2014;Al binary system containing 3-13% Al loaded with at least one workability enhancing element selected from among 001 to 50% Ni, 0.01 to 40% Fe and 0.01 to 30% Mn and having a lamellar structure wherein f.c.c. structure &#x3b1;-phase and &#x3b2;(B2)-phase are repeated in layers. The lamellar structure is so regulated that the occupancy ratio of the whole structure is 30 vol. % or above and the layer spacing is 100 &#x3bc;m or less. The Co-based alloy may contain at least one optional component selected from among Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be added in a total amount of 0.01 to 60%.

High-strength co-based alloy with enhanced workability and process for producing the same

An elastic metal strip aligning a longitudinal direction with a rolling direction of a cold-rolled plate is collected and processed to a shape including a correction plate with the longitudinal direction of the elastic metal as a width direction of a nail and a plurality of tongue strips protruded from the edge of the correction plate near the nail tip. Each tongue strip is folded and bent to form a hooked claw with a double structure of a folding part and a bending part. A nail tip of a deformed nail is inserted between the hooked claw and the correction plate to apply a restoring force of elasticity in the correction plate to the deformed nail as correction ability for deformed nails. A wrought wire rod can be used instead of a cold-rolled plate and a Cu&#x2014;Al&#x2014;Mn type shape-memory alloy may further be used as a raw material.

Corrective device for deformed nails

An iron-based alloy having shape memory properties and superelasticity, which has a composition comprising 25-35% by mass of Ni, 13-25% by mass of Co, 2-8% by mass of Al, and 1-20% by mass in total of at least one selected from the group consisting of 1-5% by mass of Ti, 2-10% by mass of Nb and 3-20% by mass of Ta, the balance being substantially Fe and inevitable impurities, and a recrystallization texture substantially comprising a &#x3b3; phase and a &#x3b3;' phase, particular crystal orientations of the &#x3b3; phase being aligned, and the difference between a reverse transformation-finishing temperature and a martensitic transformation-starting temperature being 100&#xb0; C. or less in the thermal hysteresis of martensitic transformation and reverse transformation.

Iron-based alloy having shape memory properties and superelasticity and its production method

A Co-based alloy having a fundamental composition of Co&#x2014;Al system containing 3-15% Al and having lamellar structure wherein f.c.c. structure &#x3b1;-phase and &#x3b2;(B2)-phase are superimposed on each other in layers, and the Co-based alloy is modified so as to have a porous surface layer region effective for chemical retaining capability, sustained release, biocompatibility, etc. through selective removal of either the &#x3b1;-phase or the &#x3b2;-phase from the surface layer. As a third component, at least one member selected from among Ni, Fe, Mn, Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be contained in a total amount of 0.001 to 60%.

Functional member from co-based alloy and process for producing the same

Growing community of inventors

Natori, Japan

Ryosuke Kainuma