A Bicomponent Tial Alloy with Superior Compressive Strength-Ductility Synergy Prepared by Powder Metallurgy

• DOI: 10.2139/ssrn.4458953
• Publication Date: 2023-05-25T09:25:34Z
• Authors: Peihao Ye; Xuewen Li; Hao Wu; Kesong Miao; He Wu; Rengeng Li; Chenglu Liu; C.X. Huang; Wen-Bin Fang; G.H. Fan
• Keywords: Ductility (Earth science); Powder Metallurgy

TiAl alloys are attractive as promising aerospace structural materials. However, their application is limited by the lack of a good combination strength and toughness. Here, novel alloy with two alternately distributed components (Ti48Al2Cr2Nb Ti45Al8Nb) successfully prepared powder metallurgy. As revealed compression test, material displays an adequate unprecedented strain, which high ~2.5 GPa ~48%, respectively. The Ti48Al2Cr2Nb region play critical role in accommodating deformation Ti45Al8Nb. Mechanical twins, twin intersection high-density superdislocation activated deformed bicomponent alloy, also result significantly strain hardening. strength-ductility synergy attributed to unique structure modulating coordination enhancing damage tolerance. work here provides new strategy for preparing excellent properties.