About this Abstract |
Meeting |
2020 AWS Professional Program
|
Symposium
|
2020 AWS Professional Program
|
Presentation Title |
In-situ Measurement and Numerical Simulation for Linear Friction Welding of Complex Titanium Structures |
Author(s) |
Kaiwen Zhang, Wei Zhang, Samuel Kuhr, Austin Mann, Hamish Fraser, Michael Eff |
On-Site Speaker (Planned) |
Kaiwen Zhang |
Abstract Scope |
Linear friction welding (LFW) is a solid-state joining technique that is increasingly used in aerospace industry particularly for fabricating net-shape titanium pre-forms due to reduction of raw materials and processing cost. LFW is a highly transient process involving rapid heating and cooling, severe plastic deformation, and dynamic recrystallization. Finite element models for LFW were developed based on DEFORM, a commercial finite element analysis (FEA) code to quantitatively understand the heat conduction and plastic flow during LFW, considering different joint designs and welding parameters. LFW tests were performed with Ti-6Al-4V slabs to generate both symmetrical and non-symmetrical (T-shaped) joints. Experimental measurements via embedded thermocouples, high-speed camera, and infrared camera were conducted to obtain thermal and deformation profiles in-situ. These in-situ experimental data along with ex-situ data of flash shape and joint zone geometry were used to validate the numerical models. The joint zone formation especially with respect to the disparate heat flow and deformation field in the unsymmetrical joint was discussed based on the simulation results. |
Proceedings Inclusion? |
Definite: Other |