Tailored rapid annealing to obtain heterostructured ultra-high-strength lightweight Ti-rich medium-entropy alloys

Y.C. Liao; P.S. Chen; P.H. Tsai; J.S.C. Jang; K.C. Hsieh; C.Y. Chen; J.C. Huang; H.J. Wu; I.Y. Tsao

Results in Materials (Dec 2022)

Tailored rapid annealing to obtain heterostructured ultra-high-strength lightweight Ti-rich medium-entropy alloys

Y.C. Liao,
P.S. Chen,
P.H. Tsai,
J.S.C. Jang,
K.C. Hsieh,
C.Y. Chen,
J.C. Huang,
H.J. Wu,
I.Y. Tsao

Affiliations

Y.C. Liao: Department of Mechanical Engineering, National Central University, Taoyuan, 320, Taiwan, ROC
P.S. Chen: Institute of Materials Science and Engineering, National Central University, Taoyuan, 320, Taiwan, ROC
P.H. Tsai: Institute of Materials Science and Engineering, National Central University, Taoyuan, 320, Taiwan, ROC
J.S.C. Jang: Department of Mechanical Engineering, National Central University, Taoyuan, 320, Taiwan, ROC; Institute of Materials Science and Engineering, National Central University, Taoyuan, 320, Taiwan, ROC; Corresponding author. Department of Mechanical Engineering, National Central University, Taoyuan, 320, Taiwan, ROC.
K.C. Hsieh: Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan, ROC
C.Y. Chen: Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan, ROC
J.C. Huang: Institute for Advanced Study, Department of Materials Science & Engineering, City University of Hong Kong, Kowloon, Hong Kong; Corresponding author.
H.J. Wu: Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan, ROC
I.Y. Tsao: Institute of Materials Science and Engineering, National Central University, Taoyuan, 320, Taiwan, ROC

Journal volume & issue: Vol. 16
p. 100342

Abstract

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Thermomechanical treatment (TMT) is a widely used process for effectively enhancing the mechanical properties of conventional metallic materials. This study applied TMT along with rapid annealing to a lightweight (≈5 g/cm3) Ti-rich Ti65(AlCrNb)35 medium-entropy alloy (Ti-65 MEA) to equip it with a heterogeneous structure (heterostructure). After the annealing treatment, the Ti-65 MEA exhibited a heterogenous microstructure comprising nonrecrystallized shear bands and ultrafine recrystallized grains. Remarkably, the heterostructured Ti-65 MEA had extraordinary mechanical properties (tensile strength, 1500 MPa; elongation, 25%) and ultrahigh specific strength (247 MPa cm3/g).

Published in Results in Materials

ISSN: 2590-048X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/results-in-materials

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