真空ダイカストならびに高速双ロールキャストしたアルミニウム合金の組織と引裂靭性
スポンサーリンク
概要
- 論文の詳細を見る
Vacuum die-cast and high-speed twin-roll cast products were fabricated using a heat-treatable Al-Si-Mg base alloy (A) and a non-heat-treatable Al-Mg base alloy (B). These alloys have almost equivalent tensile strength and ductility but different solidified structure. Tear toughness tests were performed using a small-size specimen and the unit crack propagation energy, UEp, was obtained from the load-displacement curve. For the vacuum die-cast products, both A and B exhibited macroscopically plane fracture surface. Dimple formation nucleated at the globular eutectic Si particles was detected in A. In contrast to that, the fracture surface of B was covered with a lamella eutectic structure. UEp was larger in A than B. Large increase in UEp was obtained for the twin-roll cast products. Their UEp values were 1.8 and 3 times larger than those of vacuum die-cast A and B, respectively. Macroscopic appearance of the twin-roll cast products was characterized by the slanted shear-type fracture path for both A and B. In addition to that, fracture surface of B showed fine dimple fracture surface. Large increase in UEp for B is due to the morphological change of the eutectic structure from the lamellar-type to the fine and globular-type induced by the rapid cooling rate of the high-speed twin-roll casting.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
- Mechanical and wear properties of SiC whisker/ADC12 aluminum alloy composites fabricated by die casting.
- Joining of aluminum and ceramics.
- タイトル無し
- Undercooling and solidification behavior of fluid clumps of second-poured melt of hypereutectic Al-Si alloy in Duplex Casting process.
- Change in apparent viscosity of stirred slurry during production of semi-solid hypereutectic Al-Si alloy by slurry-melt mixing process.