Abstract
In this paper, cold bulge forming of titanium alloy Ti55 was investigated. This process was done successfully and titanium alloy Ti55 was formed completely. Also, in the numerical work, this process has been investigated using Abaqus/ Explicit code. The results show that there is a good agreement between experimental and numerical results. Mechanical properties of Titanium alloy Ti55 have been investigated before and after bulge forming. The results show that mechanical properties of titanium alloy Ti55 have been improved during bulge forming. Also, hardness, and thickness variation tests of sheet metal before and after bulge forming were performed and the same results to mechanical properties were obtained.
Highlights
These days Sheet metal parts are made of titanium and its alloys are used extensively in the aircraft industry due to their good strength-to-weight ratio compared to steel and aluminum, corrosion resistance, and high mechanical strength at elevated temperatures
The results show that mechanical properties of titanium alloy Ti55 have been improved during bulge forming
After bulge forming of titanium blank, test pieces of deformed blank were trimmed and investigated under tension test, hardness test and thickness distribution test
Summary
These days Sheet metal parts are made of titanium and its alloys are used extensively in the aircraft industry due to their good strength-to-weight ratio compared to steel and aluminum, corrosion resistance (because of the thin adherent oxide coating), and high mechanical strength at elevated temperatures. In 2002, Mac Donald et al [2] presented finite element models to simulate axisymmetric tube bulging and hydraulic bulge forming of cross branches from a straight tube, with a particular emphasis on the state of stress and deformation of the die. They investigated effects of using internal pressure alone and combined internal pressure and axial compressive load and found that the development of stress and the location of. In 2000, Mac Donald et al [6] presented a finite element simulation of the manufacture of cross branches from straight tubes, using the bulge forming method, and investigated the effects of varying process parameters. Hardness and thickness variation tests of sheet metal before and after bulge forming were performed and the same results to mechanical properties were obtained
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