Strengthening effect of NiAl and Ni3Ti precipitates in Co-free maraging steels
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In: Journal of materials science, Vol. 58.2023, No. April, 19.04.2023, p. 7149–7160.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Strengthening effect of NiAl and Ni3Ti precipitates in Co-free maraging steels
AU - Zeisl, Stefan
AU - Van Steenberge, N.
AU - Schnitzer, Ronald
PY - 2023/4/19
Y1 - 2023/4/19
N2 - One class of maraging steels are strengthened by a combination of β-NiAl and η-Ni3Ti intermetallic phases which are precipitated during an aging heat treatment. To establish a meaningful structure-property relationship the precipitation strengthening effect from each phase must be isolated from the other strengthening mechanisms. To achieve this, a series of model alloys based on the Fe-12Ni alloy system were aged and characterized to determine the precipitation strengthening effect. In the course of this study, using a new approach, atom probe tomography was used to determine the spacing between precipitates and to calculate the individual strength contribution of the β and the η phase using a model describing the precipitate-dislocation interactions. It was found that the precipitation strengthening of the combined β and η phases is close to 1000 MPa and that the relative strengthening effect of each phase is sensitive to the Ti and Al concentration.
AB - One class of maraging steels are strengthened by a combination of β-NiAl and η-Ni3Ti intermetallic phases which are precipitated during an aging heat treatment. To establish a meaningful structure-property relationship the precipitation strengthening effect from each phase must be isolated from the other strengthening mechanisms. To achieve this, a series of model alloys based on the Fe-12Ni alloy system were aged and characterized to determine the precipitation strengthening effect. In the course of this study, using a new approach, atom probe tomography was used to determine the spacing between precipitates and to calculate the individual strength contribution of the β and the η phase using a model describing the precipitate-dislocation interactions. It was found that the precipitation strengthening of the combined β and η phases is close to 1000 MPa and that the relative strengthening effect of each phase is sensitive to the Ti and Al concentration.
U2 - 10.1007/s10853-023-08472-w
DO - 10.1007/s10853-023-08472-w
M3 - Article
VL - 58.2023
SP - 7149
EP - 7160
JO - Journal of materials science
JF - Journal of materials science
SN - 0022-2461
IS - April
ER -
