Yamaha Hatsudoki Kabushiki Kaisha

Takaharu Suzuki

Junichi Inami

Shuhei Adachi

Toshikatsu Koike

Toru Kitsunai

Shuji Tominaga

Masatoshi Miyamoto

Kenji Tsukamoto

Kazuya Iida

Yoshinori Yamauchi

A magnesium alloy frame part for use in a seat frame of a motorcycle includes a seat mounting section arranged to mount a seat thereon, the seat mounting section extending along a vehicle length direction; a first side wall section extending from the seat mounting section; a second side wall section extending from the seat mounting section and being located on the outer side, along a vehicle width direction, of the first side wall section; and a plurality of protrusions provided at at least one of a boundary between the seat mounting section and the first side wall section and a boundary between the seat mounting section and the second side wall section. The seat mounting section has a thickness greater than at least one of a thickness of the first side wall section and a thickness of the second side wall section.

Frame part, seat frame for motorcycle, and motorcycle

A magnesium alloy member includes a member main body formed of a magnesium alloy containing aluminum, and an anodic oxidation coating covering at least a portion of the member main body. The anodic oxidation coating includes a porous first layer and a second layer located between the first layer and the member main body and having a higher aluminum content than that of the first layer. The ratio of the thickness of the second layer with respect to the thickness of the anodic oxidation preferably is about 5% to about 20%.

Magnesium alloy member, method for producing the same, and transporter comprising the same

A titanium alloy part has a compressive stress of approximately 270 MPa or more within a depth of about 100 &#x3bc;m from a surface thereof. Since a large compressive stress exists in the area of the surface, the titanium alloy part exhibits a high fatigue strength.

Titanium alloy part and method for producing the same

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Shizuoka, Japan

Takaharu Suzuki