Honda Motor Co., Ltd.

National Institute for Materials Science

Daisuke Nagahama

Hiroshi Harada

Toshiharu Kobayashi

Tadaharu Yokokawa

Toshio Osada

Yuefeng Gu

Yusuke Kikuchi

Junzo Fujioka

Yasuyuki Tanimura

Motoki Okuno

An immersion probe includes a front plate having a circular shape in a plan view. A surface of the front plate that faces an object to be inspected is formed as a concave surface that is curved so as to be gradually depressed toward the center. Radii of curvature of a first imaginary contact line and a second imaginary contact line orthogonal to each other at the center of the concave surface and extending so as to curve along the concave surface are defined as a first radius of curvature and a second radius of curvature, respectively. The first radius of curvature and the second radius of curvature are different from each other. When an ultrasonic wave is emitted in a solvent, the ultrasonic wave focuses at two points.

Immersion probe, flaw inspection apparatus, and flaw inspection method

There is provided a nickel alloy having an excellent creep strength as well as high-temperature oxidation resistance. The nickel alloy of the present invention comprises, by mass percent, Cr in a range of 11.5 to 11.9%, Co in a range of 25 to 29%, Mo in a range of 3.4 to 3.7%, W in a range of 1.9 to 2.1%, Ti in a range of 3.9 to 4.4%, Al in a range of 2.9 to 3.2%, C in a range of 0.02 to 0.03%, B in a range of 0.01 to 0.03%, Zr in a range of 0.04 to 0.06%, Ta in a range of 2.1 to 2.2%, Hf in a range of 0.3 to 0.4%, and Nb in a range of 0.5 to 0.8%, the balance being Ni and unavoidable impurities, and contains carbides and borides precipitating in crystal grains and at grain boundaries.

Nickel alloy

Growing community of inventors

Saitama, Japan

Daisuke Nagahama