号数ばね論文集50号(2005年)
ページ数pp.23-30
種類論文
論文名Cu-Al-Mn合金の超弾性特性に及ぼす組織制御の効果
TitleEffect of Microstructure Control on Superelastic Property of Cu-Al-Mn Alloy
著者鈴木秀和1) 岡本貴幸1) 平田雄一1) 脇田将見1)
AuthorHidekazu SUZUKI 1) Takayuki OKAMOTO 1) Yuichi HIRATA 1) Masami WAKITA 1)
抄録
Abstract"Cu-Al-Mn Shape Memory Alloys (SMAs) have high cold-workability with high cost performance. Their superelasticity (SE) are superior to conventional Cu-based SMAs. In this study, we obtained following results; The SE properties of Cu-Al-Mn SMAs are achieved by microstructural control such as grain size and texture. When the grain size is coarser than wire diameter, the SE stress is nearly constant and the SE strain of 10% is obtained. This is achieved by adding Co to the alloy. When the grain size is finer than wire diameter, the fatigue strength is improved. This is achieved by adding B to the alloy. The addition of Ni to the Cu-Al-Mn ternary alloy shows a drastic effect on the formation of the strong〈110〉 recrystallization texture. Even for a sheet specimens having small grain size, the SE strains of 6% can be obtained in an angle of 45 degree to the rolling direction. Coil springs made by this new SMA show superior properties to conventional SMAs."
著者の所属1)中央発條
Belonging1)CHUO SPRING CO.,LTD. 
Key Words Cu-Al-Mn alloy, Shape memory alloy, Superelasticity, Texture, Fatigue strength, Coil spring