TY - JOUR
T1 - In situ tensile test of selective laser melted Ti-6.5Al-2Zr-1Mo-1V alloy at different stages of martensite decomposition
AU - Wang, Qian
AU - Wang, Meng
AU - Guo, Shuai
AU - Tao, Siyuan
AU - Zhou, Junfeng
AU - Qin, Zehao
AU - Lin, Xin
AU - Huang, Weidong
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2023/1
Y1 - 2023/1
N2 - The morphology and microstructures of Ti-6.5Al-2Zr-1Mo-1V (TA15) samples at different stages of martensite decomposition fabricated by selective laser melting are characterized during the in situ tensile test, and the deformation and crack mechanisms are discussed. The results show that the as-deposited samples with full martensite structure, former being recognized as a state of poor plasticity, possess excellent ductility (with a maximum displacement of 0.74 mm) due to the cooperative deformation behavior of hierarchical martensites. The full-annealed sample, consisting of lamella (α + β) laths, also shows good ductility (0.65 mm) with the enhanced collaborative deformation behaviors between α and β laths. However, for samples with partially decomposed martensite structure, abrupt fracture after yielding was observed with deteriorated ductility (0.54 mm), as the slipping of dislocations is hampered by the dispersive nano-β precipitations.
AB - The morphology and microstructures of Ti-6.5Al-2Zr-1Mo-1V (TA15) samples at different stages of martensite decomposition fabricated by selective laser melting are characterized during the in situ tensile test, and the deformation and crack mechanisms are discussed. The results show that the as-deposited samples with full martensite structure, former being recognized as a state of poor plasticity, possess excellent ductility (with a maximum displacement of 0.74 mm) due to the cooperative deformation behavior of hierarchical martensites. The full-annealed sample, consisting of lamella (α + β) laths, also shows good ductility (0.65 mm) with the enhanced collaborative deformation behaviors between α and β laths. However, for samples with partially decomposed martensite structure, abrupt fracture after yielding was observed with deteriorated ductility (0.54 mm), as the slipping of dislocations is hampered by the dispersive nano-β precipitations.
UR - https://www.scopus.com/pages/publications/85145163612
U2 - 10.1007/s10853-022-08099-3
DO - 10.1007/s10853-022-08099-3
M3 - 文章
AN - SCOPUS:85145163612
SN - 0022-2461
VL - 58
SP - 1798
EP - 1812
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 4
ER -