タイトル無し
スポンサーリンク
概要
- 論文の詳細を見る
In notched fracture tests of 5083 alloy at low temperatures such as notched tensile, Charpy impact and tear tests, numerous sharp cracks are produced perpendicular to the fracture surface and result in laminated fracture. Behaviors of sub-cracking at -196°C were investigated by V-notch Charpy tests and the nature of the laminated fracture was discussed.It has been shown that sub-cracks are formed always in the plane of the plate and propagates along grain boundaries which are elongated in the rolling direction. For equi-axed grains, no cracking is observed. Precipitation of β-phase at grain boundaries markedly accelerates such cracking as the unit propagation energy (UPE) in the tear test in the short transverse direction decreases. Intermetallic constituents are also associated with cracking but are not the main reason for cracking.Based upon the observations, it is concluded that cracking is caused by the intergranular fracture in the plane of the plate as a result of the precipitation of β-phase. It has also been found that the total length of sub-cracks linearly decreases as increasing the product of the tensile strength and UPE in the short transverse direction.
- 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.