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Mechanical properties of a thermal treated commercially pure Grade 2 titanium plate (Cp Ti Grade 2)
Author(s)
Mpumlwana, Dumo
Date Issued
2021
Type
Thesis
Publisher
Cape Peninsula University of Technology
Abstract
The significant improvement when titanium is utilized in different designing fields is its high explicit quality and resilience against high temperatures while maintaining its quality within a wide temperature range. Titanium is produced for commercial use in two different formats; commercially pure and alloyed. Titanium additionally shows high corrosion resistance, high malleability, exhaustion quality, and high strength to mass temperature ratios in most force application media. Commercially pure titanium grade 2 (CP-Ti grade 2) has a yield strength of 540 MPa joined with great flexibility, formability, and phenomenal weldability. Grade 2 titanium has a density of 4.51 g/cm3 which is 60 % less compared to steel.
This research presents the examination of the mechanical properties of (CP-Ti) hot-rolled plates through the microstructure analysis, tensile testing, microhardness testing and scanning electron microscope (SEM) analysis. The samples were prepared through the use of a water-jet cutter to prevent an introduction of unnecessary heat to the samples. The prepared samples were then heat-treated using a standard furnace by soaking them in a furnace oven at 900°C for different soaking times. The tensile testing, microhardness testing, microstructural analysis and scanning electron microscope (SEM) were performed in all heat treated and non-treated samples, and the results were compared to the non-treated samples.
Performing a tensile test in all heat-treated and non-treated samples allowed the analysis of different mechanical properties and distinguished between elastic and plastic deformation. Performing the microstructure test in treated and untreated samples allowed the analysis of the surface coordinates of each particle of the tested samples. The hardness test of heat-treated and non-treated samples determined the appropriateness of a material for a specified application, or the particular treatment to which the material has been subjected. SEM for heat-treated and non-treated samples determined the surface fracture.
It was noticeable that the heating period had an impact on the hardness of the samples. The largest hardness was found on the 90 minutes treatment. In microstructural analyses is was noticeable that heat treatment influences the growth of grains. There was a decrease in tensile strength in all heat-treated samples compared with the non-treated samples. A ductile fracture was noticeable in all heat-treated samples.
This research presents the examination of the mechanical properties of (CP-Ti) hot-rolled plates through the microstructure analysis, tensile testing, microhardness testing and scanning electron microscope (SEM) analysis. The samples were prepared through the use of a water-jet cutter to prevent an introduction of unnecessary heat to the samples. The prepared samples were then heat-treated using a standard furnace by soaking them in a furnace oven at 900°C for different soaking times. The tensile testing, microhardness testing, microstructural analysis and scanning electron microscope (SEM) were performed in all heat treated and non-treated samples, and the results were compared to the non-treated samples.
Performing a tensile test in all heat-treated and non-treated samples allowed the analysis of different mechanical properties and distinguished between elastic and plastic deformation. Performing the microstructure test in treated and untreated samples allowed the analysis of the surface coordinates of each particle of the tested samples. The hardness test of heat-treated and non-treated samples determined the appropriateness of a material for a specified application, or the particular treatment to which the material has been subjected. SEM for heat-treated and non-treated samples determined the surface fracture.
It was noticeable that the heating period had an impact on the hardness of the samples. The largest hardness was found on the 90 minutes treatment. In microstructural analyses is was noticeable that heat treatment influences the growth of grains. There was a decrease in tensile strength in all heat-treated samples compared with the non-treated samples. A ductile fracture was noticeable in all heat-treated samples.
Additional information
Thesis (MEng (Mechanical Engineering))--Cape Peninsula University of Technology, 2021
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