Effect of intercritical heat treatment on microstructure, nano-size precipitation and mechanical properties of Fe–Ni–Cu–Al low carbon steel

High temperature tribological properties of Fe-Mo-Ni-Cu-Graphite self-lubricating guide sliding plates

“…In the microstructure of Fe-Mo-Ni-5Cu-graphite material, as observed from the figures 3(a)-(c), the dark gray areas represent fine martensitic laths (typical needle shaped ) and a small amount of red copper and pearlite are intermixed within the matrix [16]. The black regions depict pearlite dispersed within the matrix.…”

Thermal Mechanical Behavior and Microstructure Characteristics of As‐Cast FeCrNiAl Steel

“…The influence of alloying elements on the precipitation of β-NiAl phase and γ-Ni3Al phase in steels has been widely studied by many researchers. [5][6][7] It is found that β-NiAl precipitates in Fe-1.09Al-2.64Ni-1.94Mn steel after rolling and aging treatment, and Mn element can replace the position of Al atom of β-NiAl, and promotes the formation of γ-Ni3Al precipitate. [5] As the content of Ni increases, the structure of the Ni-Al phase would vary, and the β-NiAl precipitates would further transform into γ-Ni3Al structure.…”

“…The precipitation diameter of γ-Ni3Al varies from 57.6 nm in sample with 6.4% austenite to that of 22.4 nm with 1.62% austenite in Fe-8Ni-Al-0.5Mn-0.5Cr steel. [6,7] β-NiAl can sub-precipitates within the main γ-Ni3Al precipitates, and vice versa, to form a hierarchical structure of the precipitates. [4][5][6]8,9] The elements Ni and Al in matrix are easy to move to the surface of the Ni3Al particle for further coarsening during the high-temperature holding process, and the coarsening rate of Ni3Al particles significantly increases with the increase of temperature.…”

“…[4][5][6]8,9] The elements Ni and Al in matrix are easy to move to the surface of the Ni3Al particle for further coarsening during the high-temperature holding process, and the coarsening rate of Ni3Al particles significantly increases with the increase of temperature. [7] However, large amounts of alloying elements will deteriorate the thermal deformation capability of steels, and the thermal mechanical behavior and microstructural evolution during high-temperature deformation process should directly result in room-temperature mechanical properties. It has been reported that the β-NiAl precipitates are not sheared by dislocations due to its high hardness, and hence act as an effective barrier to dislocation movements, and nano-sized β-NiAl precipitates within the ferrite phase is observed to be slightly coarsened (up to ≈70 nm) with pileup of dislocations as compared to the low temperature at a strain of 0.3 and at temperature of 1423 K. [10] It has been found that two distinct characteristics of localized hardening and localized softening exhibit in all the deformation conditions, and it is proposed that the phenomenon is associated with the different deformation mechanism within the individual phases, interplay between dual precipitation during deformation, strain partitioning between the phases, and flow instabilities.…”

“…[ 4–6,8,9 ] The elements Ni and Al in matrix are easy to move to the surface of the Ni3Al particle for further coarsening during the high‐temperature holding process, and the coarsening rate of Ni3Al particles significantly increases with the increase of temperature. [ 7 ]…”