Research on Complete Recycling Technology for Aluminum Recycled Alloys

Ryo Wakabayashi･Yasushi Mashiyama (Honda R&D)･Hiroaki Funada (Honda Trading)･Shinichi Satonaka･Satoshi Kato･Takamitsu Satake (Honda Trading Aluminum)

Aluminum alloys for automotive power units are mainly manufactured from scrap, but contain iron parts. Therefore, thermal diffusion occurs in the molten metal during alloy manufacturing, which can increase the amount of Fe. In addition, scrap in the market can also be found to have a high Fe content, making it necessary to reduce the amount of Fe. In this study, we developed a technology to reduce the amount of Fe that can be fully recycled without relying on cascade recycling.

The Influence of the Forming Strain in Crash-bead Forming on the Axial Crash Bahavior of Aluminum Alloy Extrusion

Shun Takenaka･Taiki Yamakawa･Narikazu Hashimoto (Kobe Steel)

Aluminum alloy extrusion products can be designed with bead shapes in order to control the deformation mode. In this study, bead forming and axial crush simulation were conducted to clarify the influence of fracture and pre-forming on axial crush behavior.

Elucidation of Wear Mechanisms of Al-Sn-Si Alloys for Sliding Bearings under Lubricating Conditions

Jun Sahashi･Tomomi Honda･Tomohiko Kon (University of Fukui)

The seizure phenomenon of Al-Sn-Si alloys under lubricating conditions with additives was investigated via tests performed on a sliding bearing. Wear primarily occurs at the apex of the bearing. However, unlike in certain worn areas, there is no formation of a black boundary film, as observed in linear contact tests. The coefficient of friction and contact electrical resistance change in a manner consistent with observations from linear contact tests.

Development of Life Prediction Technology for Lead Wire Solder Joints using an S-N Curve

Shunsuke Sakai･Takashi Furukawa･Rie Aoyagi･Daisuke Kiryu (Yamada Manufacturing)･Takashi Yamazaki (Yamada Auto Parts Research & Development)

Strain in the solder joint was predicted by performing CAE anaylsis on a 3D model of a solder joint with lead wire which replicates the fracture state observed in a solder fatigue test, and an S-N curve was created.In order to verify the validity of this method, solder fatigue tests were conducted on a circuit board for a small motor, and it was confirmed that the actual fracture locations, strain concentration location CAE results, and fracture cycles were in good agreement.