Furukawa Techno Material Co., Ltd.

The Furukawa Electric Co., Ltd.

Kenji Uruma

Sumio Kise

Toyonobu Tanaka

Fumiyoshi Yamashita

Yoshitaka Azuma

Shigekazu Yokoyama

Toyohiko Higashida

Nanami Kataoka

Kouji Ishikawa

A Ni—Ti-based alloy material includes a matrix phase consisting essentially of a Ni—Ti-based alloy and having a B2 type crystal structure. A nonmetallic inclusion is present in the matrix phase, in which 99% by mass or more of the nonmetallic inclusion is a TiC-based inclusion having a NaCl type crystal structure, the TiC-based inclusion has a lattice misfit (δ) in a range of 0.4238 or more and 0.4259 or less. The lattice misfit (δ) is represented by Expression δ=(a1−a2)/a2, where a1 is a lattice constant (Å) of the TiC-based inclusion and a2 is a lattice constant (Å) of the matrix phase.

Ni—Ti-based alloy material, method for producing Ni—Ti-based alloy material, and wire or tube including Ni—Ti-based alloy material

A formed body of Cu—Al—Mn-based shape-memory alloy may include a screw portion, wherein the screw portion is a form-rolled portion. A method for producing a formed body of Cu—Al—Mn-based shape-memory alloy may involve forming a screw portion having superelasticity by plastically working at least a portion of a material for the formed body with form-rolling in a state that a crystal structure is an A2-type structure and then, subjecting heat-treatment so as to convert the A2-type crystal structure into an L-type crystal structure. The screw portion can be formed with good working property, and has excellent fatigue resistance and breaking resistance.

Formed body of Cu—Al—Mn-based shape-memory alloy and method for producing same

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Hiratsuka, Japan

Kenji Uruma