Effect of C content on the mechanical properties of solution treated as-cast ASTM F-75 alloys

Abstract

The mechanical properties of solution treated ASTM F-75 alloys with various carbon contents have been studied. Alloys cast under the same conditions were subjected to solution treatment for several periods and then their tensile properties were evaluated. In the as-cast conditions, the alloys exhibited higher strength values with increasing carbon content whereas their ductility was not significantly affected. For the solution treated alloys, the variation of the strength was characterized by a progressive increase for short treatment times until a maximum value was achieved, which was followed by a diminution in this property for longer treatment times. This behavior was more accentuated for the case of the alloys with medium carbon contents, which also exhibited the highest values of strength. Furthermore, the alloy's ductility was enhanced progressively with increasing solution treatment time. This improvement in ductility was significantly higher for the medium carbon alloys compared with the rest of the studied alloys. Thus, high and low carbon contents in solution treated ASTM F-75 alloys did not produced sufficiently high tensile properties.

Onset of Surface Damage in Modular Orthopedic Implants: Influence of Normal Contact Loading and Stress-assisted Dissolution

“…Flattening of asperity peaks during the first cycle results in increase of contact area for each asperity and also increases the number of asperities coming in contact with the indenter during subsequent loading cycles. In addition, CoCrMo undergoes significant work hardening during plastic deformation [37,38]. Consequently, asperities are plastically deformed only during the first loading cycle and in subsequent cycles surface deformation is elastic with little or no incremental plastic deformation [39].…”

“…Cast cobalt-chromium alloy (CoCrMo) display significant hardening during plastic deformation [37,38]. There- is meshed using six noded plain strain triangular elements and mesh refinement was performed to achieve numerical convergence.…”

Carbide Formation and Dissolution in Biomedical Co-Cr-Mo Alloys with Different Carbon Contents during Solution Treatment

“…The behavior of the carbides during solution treatment and the optimal solution treatment conditions have been investigated by other research groups. [8][9][10][11][12][13][14][15][16] Dobbs and Robertson observed incomplete carbide dissolution in a Co-28.9Cr-5.58Mo-0.24C alloy containing additional Si, Mn, Fe, Ni, Al, and Ti after heat treatment at 1513 K for 7.2 ks. [9] Herrera et al reported incomplete precipitate dissolution in Co-27Cr-6Mo-xC (x = 0.17, 0.23, and 0.30 mass pct) alloys that were heat treated at 1503 K for up to 14.4 ks.…”

“…Therefore, the behavior of carbides formed in Co-Cr-Mo alloys during heat treatment has been investigated in some studies. [8][9][10][11][12][13][14][15][16][17][18] Several studies have focused on investigating the dissolution behavior of carbides during solution treatment. [8][9][10][11][12][13][14][15][16] Although the precipitation or dissolution behavior of carbides is essential knowledge to establish an effective and low-cost manufacturing process for Co-Cr-Mo alloys, a systematic explanation of the behavior of carbides during solution treatment has not been reported thus far.…”

Pengaruh Penambahan Karbon Dan Nitrogen Terhadap Mikrostruktur, Kekuatan Tarik Dan Mampu Bentuk Paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni [Influence of Additional Carbon And Nitrogen on Microstructure, Tensile Strength And Workability of Co- 28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni]

“…Karbon dalam paduan Co -Cr-Mo merupakan unsur pembentuk presipitat, semakin tinggi kandungan karbon maka presipitat yang terbentuk semakin banyak [7][8] . Karbon pada paduan Co-Cr-Mo dapat meningkatkan kekuatan tarik [9] . Menurut M. Herrera dan timnya penambahan karbon hingga 0,30% dapat meningkatkan nilai kekuatan tarik hingga lebih dari 700 MPa pada paduan Co-Cr-Mo hasil coran.…”