Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy
The effects of heavy cold plastic deformation by rolling on microstructural features and mechanical properties of Ti–25Nb–6Zr–1.7Fe (wt %) biocompatible alloy (TNZF) were studied. After a preliminary alloy processing, a heavy plastic deformation by cold-rolling (CR) wit...
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MDPI AG
2018-04-01
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| Online Access: | http://www.mdpi.com/2075-4701/8/5/297 |
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| author | Vasile Dănuț Cojocaru Nicolae Șerban |
| author_facet | Vasile Dănuț Cojocaru Nicolae Șerban |
| author_sort | Vasile Dănuț Cojocaru |
| collection | DOAJ |
| description | The effects of heavy cold plastic deformation by rolling on microstructural features and mechanical properties of Ti–25Nb–6Zr–1.7Fe (wt %) biocompatible alloy (TNZF) were studied. After a preliminary alloy processing, a heavy plastic deformation by cold-rolling (CR) with a total relative degree of plastic deformation of 90% (equivalent plastic strain, ε = 2.42) and a subsequent solution heat treatment (CR+ST) at 900 °C for 0.6 ks/water quenching were applied and then investigated. The CR and CR+ST states have microstructures consisting of mixtures of β-Ti phases and α″-Ti. The alloy in CR state shows a pronounced deformation texture, with highly deformed and elongated β-Ti grains, exhibiting internal highly fragmented areas, with shear lines at about 45° and a sub-micron/nanocrystalline fine dispersed α″-Ti phase. The alloy in CR+ST state has completely recrystallized equiaxed polyhedral β-Ti grains, with average grain size close to 52 μm and a sub-micron/nanocrystalline fine dispersed α″-Ti phase. Recorded mechanical properties, for both CR and CR+ST states, show quite similar values for the yield strength (σ0.2), ultimate tensile strength (σUTS) and Vickers microhardness (HV0.1) for CR state (σ0.2 = 603 MPa, σUTS = 1282 MPa and 287 HV0.1) in comparison with CR+ST state (σ0.2 = 598 MPa, σUTS = 1256 MPa and 256 HV0.1). Values for the modulus of elasticity (E) are lower (E = 72 GPa for CR state and E = 61 GPa for CR+ST state) than those for conventional biocompatible alloys (E ~ 110 GPa). |
| first_indexed | 2024-04-12T17:15:59Z |
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| last_indexed | 2024-04-12T17:15:59Z |
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| spelling | doaj.art-769af49b8d644074b3425efb00a282462022-12-22T03:23:38ZengMDPI AGMetals2075-47012018-04-018529710.3390/met8050297met8050297Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe AlloyVasile Dănuț Cojocaru0Nicolae Șerban1Materials Science and Engineering Faculty, University POLITEHNICA of Bucharest, 060042 Bucharest, RomaniaMaterials Science and Engineering Faculty, University POLITEHNICA of Bucharest, 060042 Bucharest, RomaniaThe effects of heavy cold plastic deformation by rolling on microstructural features and mechanical properties of Ti–25Nb–6Zr–1.7Fe (wt %) biocompatible alloy (TNZF) were studied. After a preliminary alloy processing, a heavy plastic deformation by cold-rolling (CR) with a total relative degree of plastic deformation of 90% (equivalent plastic strain, ε = 2.42) and a subsequent solution heat treatment (CR+ST) at 900 °C for 0.6 ks/water quenching were applied and then investigated. The CR and CR+ST states have microstructures consisting of mixtures of β-Ti phases and α″-Ti. The alloy in CR state shows a pronounced deformation texture, with highly deformed and elongated β-Ti grains, exhibiting internal highly fragmented areas, with shear lines at about 45° and a sub-micron/nanocrystalline fine dispersed α″-Ti phase. The alloy in CR+ST state has completely recrystallized equiaxed polyhedral β-Ti grains, with average grain size close to 52 μm and a sub-micron/nanocrystalline fine dispersed α″-Ti phase. Recorded mechanical properties, for both CR and CR+ST states, show quite similar values for the yield strength (σ0.2), ultimate tensile strength (σUTS) and Vickers microhardness (HV0.1) for CR state (σ0.2 = 603 MPa, σUTS = 1282 MPa and 287 HV0.1) in comparison with CR+ST state (σ0.2 = 598 MPa, σUTS = 1256 MPa and 256 HV0.1). Values for the modulus of elasticity (E) are lower (E = 72 GPa for CR state and E = 61 GPa for CR+ST state) than those for conventional biocompatible alloys (E ~ 110 GPa).http://www.mdpi.com/2075-4701/8/5/297titanium alloyscold plastic deformationsolution heat treatingscanning electron microscopyX-ray diffractionmechanical testing |
| spellingShingle | Vasile Dănuț Cojocaru Nicolae Șerban Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy Metals titanium alloys cold plastic deformation solution heat treating scanning electron microscopy X-ray diffraction mechanical testing |
| title | Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy |
| title_full | Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy |
| title_fullStr | Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy |
| title_full_unstemmed | Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy |
| title_short | Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy |
| title_sort | effects of solution treating on microstructural and mechanical properties of a heavily deformed new biocompatible ti nb zr fe alloy |
| topic | titanium alloys cold plastic deformation solution heat treating scanning electron microscopy X-ray diffraction mechanical testing |
| url | http://www.mdpi.com/2075-4701/8/5/297 |
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