Dynamic Behaviour of Multi-phase Materials
Abstract
This project will investigate the micro-mechanisms of dynamic deformation in heterogeneous materials containing multiple (FCC, BCC, HCP) phases while subjected to extreme loading conditions. We will conduct our research program in our state-of-the-art testing facilities at UNSW Canberra: a convertible single/double stage gas gun able to achieve impact velocities of 4.5 km/s and a compression/tensile Hopkinson bar equipped with furnace (up to 1500ºC). Our diagnostic equipment to monitor the in-situ deformation includes: a 4-point Photon Doppler Velocimetry (PDV) and a variety of high speed cameras (e.g. Phantom). We will examine the deformed microstructures via SEM (EBSD), TEM and X-Ray analyses. These techniques collectively will allow us to provide a comprehensive understanding of how microstructural features affect the overall dynamic mechanical response. In specific, we will shed light on the fundamental dynamic deformation mechanisms within and across grains of different sizes and phases in a duplex steel, our selected testbed material. This fundamental scientific information will be very valuable as input and validation of mesoscale models currently used by scientists worldwide (e.g. AFRL, LANL) to accurately predict material behaviour under extreme conditions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA23861714095
Entities
People
- Juan Pablo Escobedo-diaz
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of New South Wales