Improve Durability of FSW Tools using Coating Technology

Sarina Shibata･Ryu Yoshiura･Souichiro Nishino (Ibaraki University)･Yukitaka Sumiya (Japan Coating Center)

Friction stir welding (FSW) has been widely applied to aluminum alloys as a joining technology with low distortion. On the other hand, improving the life of FSW tools has become an issue, and various materials and shapes have been investigated. In this study, we attempted to improve tool life by applying PVD coating technology, which is widely used for tool steel, to FSW tools.

Effect of Welding Speed on Resistance Seam Welding of Stainless Steel Foil Material

Tomoki Otsuka･Shion Koyama･Souichiro Nishino (Ibaraki University)･Seiya Yoshikawa (ART-HIKARI)･Tetsuya Nogami･Reina Araya (NOGAMI)

The use of stainless steel foil material is being considered to achieve both thin-wall and lightweight designs in battery systems. In this study, resistance seam welding was performed on stainless steel foil materials ranging from 200 μm to 20 μm to investigate the effect of welding speed on joint strength and fracture morphology.

Multi-Scale CT Observation of Al-Adhesive Interface during Tensile Test

Takanori Itoh･Norio Saito･Masayuki Inaba･Chulho Song･Emi Mukai･Takashi Kumamoto (Nissan ARC)･Akihisa Takeuchi･Masayuki Uesugi･Yuki Sada (SPring-8/JASRI)･Hiro Fujihara･Hiroyuki Toda (Kyushu University)

Using the synchrotron X-ray multi-scale (μ-scale, nano-scale) CT, we observed while performing a tensile test using a piece of Al-adhesive specimen. We discussed the destruction source of the Al-adhesive specimen. For μ-CT, we study the movement of the filler until the destruction. For nano-CT, the behavior of the Al-adhesive interface, the adhesive-filler interface, and the adhesive-added interface are discussed.

Evaluation of Corrosion Resistance of Stainless Steels in Lithium-Ion Battery Environments

Satoshi Sampei･Atsutaka Hayashi･Junichi Hamada (Nippon Steel)

The corrosion resistance of stainless steel was evaluated through potentiostatic electrolysis and immersion tests, simulating the environment of the cathode components and casing of lithium-ion batteries

Friction and Wear Characteristics of Stainless Steels for Brake Discs

Toshiki Yoshizawa･Atsutaka Hayashi･Jun-ichi Hamada･Takanori Kato･Yuiko Sakayama (Nippon Steel)

The stainless steel and cast iron were subjected to braking tests under varying corrosion conditions and braking loads. The appearance, friction and wear characteristics, and the amount of brake dust were evaluated. The cast iron exhibited deterioration in friction and wear characteristics and an increase in brake dust due to rust formation. In contrast, the stainless steel did not rust, and its friction and wear characteristics, as well as the amount of brake dust, remained unchanged.

Smart Lightweight and Performance Solutions for Structural Parts by Tailor Rolled Blanks

Hubertus Steffens (Mubea Tailor Rolled Blanks)･Taranjeet Singh (Mubea Japan)･Torben Wilks･Christoph Hahn (Mubea Tailor Rolled Blanks)

TRB Benefit for Functional Improvement in Performance, Manufacturing, Part Integration, Design Simplification, Weight Reduction Cold Forming Tailor Hardened Technology