Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction

Peng, Shang; Wang, Zhili; Li, Jia; Fang, Qihong; Wei, Yujie

doi:10.1016/j.ijplas.2023.103710

Cited by 27 publications

(1 citation statement)

References 51 publications

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“…According to precipitation hardening mechanisms models, these very small precipitates, coherent and/or semi-coherent with the matrix, are sheared by the dislocation in their slip planes during the plastic deformation of the material. This leads to a high hardness value, and the maximum value of the hardness/mechanical strength versus the aging time curve (peak hardness) occurs when the volume fraction of precipitates reaches the equilibrium value [27,[35][36][37].…”

Section: Precipitation Hardeningmentioning

confidence: 99%

Influence of Mo Content on the Precipitation Behavior of 13Ni Maraging Ultra-High Strength Steels

da Fonseca,

Altoé,

Archanjo

et al. 2023

Metals

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This study offers valuable insights into the precipitation behavior of 13Ni maraging steels, emphasizing the role of molybdenum content in their microstructure, strengthening, and precipitate evolution. Precipitate morphology and crystallography were examined using a combination of high-resolution transmission electron microscopy and selected area electron diffraction. Strengthening mechanisms were assessed through Vickers hardness measurements. All the examined samples exhibited a lath martensite microstructure and displayed an increasing hardness over the aging time. The molybdenum content not only influenced the presence of retained austenite in the initial microstructure but also affected the type of precipitates formed during the early aging stages. Initially, Ni3Mo precipitates were formed, succeeded by the formation of more stable Fe2(Mo,Ti) Laves precipitates. The ultra-high strength of 13Ni maraging steels arises from the combination of the precipitate type and size distribution. The base composition of 13Ni maraging steels achieved a peak hardness of 798 HV1 through the precipitation of Laves Fe2(Mo,Ti) phases ranging from 3 to 14 nm in diameter.

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Section: Precipitation Hardeningmentioning

confidence: 99%