[P] P248~P271 Structural Materials

[P259] Controlling Mechanical Properties of Ti-Based High-Strength Mille-Feuille Materials by Addition of Third Elements

○Yuting LI¹、Takuya Yonemura¹, Toko Tokunaga, Koji Hagihara¹ (1. Nagoya Institute of Technology)

Keywords:

Grain/colony-size distribution

This study examines how Ga, Ta, and Zr additions affect Ti-Fe based mille-feuille alloys. Ga- and Ta-added alloys kept lamellar structures and showed higher yield stress at 600 °C. EBSD analysis suggests that Ta addition reduces coarse grains/colonies, suppresses large kink-band formation, and improves high-temperature strength.