TY - JOUR
T1 - Influence of Ti addition on the precipitation behavior and mechanical properties of Ni-7.9Cr-5.9W-22.2Mo superalloy
AU - Li, Xiaolin
AU - He, Yi
AU - Li, Qian
AU - Kang, Junhong
AU - Li, Yating
AU - Gao, Xiangyu
AU - Deng, Xiangtao
AU - Wang, Haifeng
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/6/15
Y1 - 2023/6/15
N2 - The Ni-7.9Cr-5.9W-22.2Mo-1.4Ti superalloy based on Ni-8Cr-6W-22.5Mo (the Haynes 244 alloy) was prepared to investigate the effect of Ti addition on the precipitation behavior and mechanical properties. The results indicate that the addition of Ti can facilitate the formation of C11b and D022 superlattice phases simultaneously after age-treated at 650 °C for 240 h. The yield strength is significantly improved to 1645 MPa compared with Ni-8Cr-6 W-22.5Mo with only the formation of C11b and a yield strength of 1297 MPa. The excellent strengthening effect of C11b and D022 superlattice phases are attributed to both order strengthening and coherency strengthening, and their calculated contributions to strengthening are 148 MPa and 439 MPa for D022 and 83 MPa and 208 MPa for and C11b, respectively. Together with solid-solution strengthening and grain refinement strengthening, the theoretically calculated yield strength matches well with the experimental results. In addition, the deformation mode changes from deformation slip to strain-induced twinning after the Ti addition.
AB - The Ni-7.9Cr-5.9W-22.2Mo-1.4Ti superalloy based on Ni-8Cr-6W-22.5Mo (the Haynes 244 alloy) was prepared to investigate the effect of Ti addition on the precipitation behavior and mechanical properties. The results indicate that the addition of Ti can facilitate the formation of C11b and D022 superlattice phases simultaneously after age-treated at 650 °C for 240 h. The yield strength is significantly improved to 1645 MPa compared with Ni-8Cr-6 W-22.5Mo with only the formation of C11b and a yield strength of 1297 MPa. The excellent strengthening effect of C11b and D022 superlattice phases are attributed to both order strengthening and coherency strengthening, and their calculated contributions to strengthening are 148 MPa and 439 MPa for D022 and 83 MPa and 208 MPa for and C11b, respectively. Together with solid-solution strengthening and grain refinement strengthening, the theoretically calculated yield strength matches well with the experimental results. In addition, the deformation mode changes from deformation slip to strain-induced twinning after the Ti addition.
KW - C11 and D0 superlattice phases
KW - Mechanical properties
KW - Ni-based superalloys
KW - Precipitation strengthening
KW - Twinning deformation
UR - http://www.scopus.com/inward/record.url?scp=85148722500&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2023.169277
DO - 10.1016/j.jallcom.2023.169277
M3 - 文章
AN - SCOPUS:85148722500
SN - 0925-8388
VL - 946
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 169277
ER -