Liao, Y.C.Y.C.LiaoChen, P.S.P.S.ChenTsai, P.H.P.H.TsaiJang, J.S.C.J.S.C.JangHsieh, K.C.K.C.HsiehChen, C.Y.C.Y.ChenHuang, J.C.J.C.HuangHSIN-JAY WUTsao, I.Y.I.Y.Tsao2024-09-182024-09-182022https://www.scopus.com/record/display.uri?eid=2-s2.0-85140984973&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/721151論文編號: 100342Thermomechanical 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). © 2022Crystal structureMetals and alloysMicrostructurejournal article10.1016/j.rinma.2022.1003422-s2.0-85140984973