Fatigue life prediction of laser and mechanically formed commercially pure grade 2 titanium alloy plates

Mjali, Kadephi Vuyolwethu

doi:10.1016/j.promfg.2020.05.046

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…Within the titanium alloy, aluminium is the alpha-phase stabilizer, whereas vanadium is the beta-phase stabilizer [8][9][10][11][12]. Commercially pure titanium (CP-Ti) undergoes an allotropic transformation at 882.5°C and transforms from a hexagonal close pack (HCP) crystal structure to body-centered cubic (BCC) [13][14][15][16]. ere are numerous studies that were conducted to understand the impact heat and mechanical treatments on various properties of titanium and its alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Mechanical Properties of a 3 mm Commercially Pure Titanium Plate (CP-Ti Grade 2)

Mpumlwana

Msomi

Fourie

2021

Journal of Engineering

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Titanium is seen as a good material for application in many fields due to its compatibility with different environments. However, it remains unclear whether what happens when this material is exposed to certain high temperatures for longer periods of time. The primary objective of this study was to investigate the effect of heat on a 3 mm commercially pure titanium grade 2 plate at a constant temperature of 900°C at different heating times. Three different heating times were employed in this study: 30 minutes for the first period, 60 minutes for the second period, and 90 minutes for the third period. All heated samples were air cooled to room temperature after each heating period. Microhardness, microstructure, tensile strength, and scanning electron microscopy (SEM) tests were performed. All the results were analyzed and compared with the parent sample. It was observed that the heating period influenced microstructural arrangement of the material. The microstructural changes affected negatively the ultimate tensile strength while percentage elongation was improved. The microhardness of the heat treated samples were firstly negatively affected which later jumped and exceeded that of the parent material.

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