TY - JOUR
T1 - Mechanical behavior and microstructural evolution during cyclic tensile loading-unloading deformation in metastable Ti–10V–2Fe–3Al alloy
AU - Wang, Xueli
AU - Li, Fuguo
AU - Xu, Tianyu
AU - Ma, Shitong
AU - Da, Cheng
AU - Wang, Minghe
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/2/17
Y1 - 2022/2/17
N2 - The mechanical behavior and microstructural evolution for Ti–10V–2Fe–3Al (Ti-1023) alloy with a single metastable β-grains obtained by β solution treatment (β-ST) were discussed by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) during the various early stages of cyclic tensile loading-unloading deformation (abbreviated as cyclic deformation) at ambient temperature. The main deformation product is stress-induced martensite transformation (SIMT) by coupling mechanical characterization and microstructure observation. With the cycles increasing, the trigger stress of SIMT (σSIMT) decreases with a stress plateau (120 MPa ±10), and the volume fraction of SIMT gradually increases until a nearly complete α″ martensite microstructure. Besides, the deformation-induced martensite twins (DIMT) in the α″ martensite have been generated until reaching a certain strain value. Moreover, there is specific orientation relationships (SORs) between β matrix and α″ martensite with <100>β//<100>α″, <110>β//<010>α″, and <110>β//<001>α″. And the geometrically necessary dislocations (GNDs) structure evolution is sensitive to cyclic strain and grain orientation. Moreover, GNDs synergizes the microstructure evolution and mechanical behavior.
AB - The mechanical behavior and microstructural evolution for Ti–10V–2Fe–3Al (Ti-1023) alloy with a single metastable β-grains obtained by β solution treatment (β-ST) were discussed by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) during the various early stages of cyclic tensile loading-unloading deformation (abbreviated as cyclic deformation) at ambient temperature. The main deformation product is stress-induced martensite transformation (SIMT) by coupling mechanical characterization and microstructure observation. With the cycles increasing, the trigger stress of SIMT (σSIMT) decreases with a stress plateau (120 MPa ±10), and the volume fraction of SIMT gradually increases until a nearly complete α″ martensite microstructure. Besides, the deformation-induced martensite twins (DIMT) in the α″ martensite have been generated until reaching a certain strain value. Moreover, there is specific orientation relationships (SORs) between β matrix and α″ martensite with <100>β//<100>α″, <110>β//<010>α″, and <110>β//<001>α″. And the geometrically necessary dislocations (GNDs) structure evolution is sensitive to cyclic strain and grain orientation. Moreover, GNDs synergizes the microstructure evolution and mechanical behavior.
KW - Cyclic tensile loading-unloading deformation
KW - Geometrically necessary dislocations (GNDs)
KW - Orientation relationships (ORs)
KW - Stress-induced martensite transformation (SIMT)
KW - Ti-10V–2Fe–3Al alloy
UR - http://www.scopus.com/inward/record.url?scp=85122929019&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.142663
DO - 10.1016/j.msea.2022.142663
M3 - 文章
AN - SCOPUS:85122929019
SN - 0921-5093
VL - 835
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 142663
ER -