Porosity Analysis and Mechanical Characterization of Laser Welds
Abstract not provided.
Publications
Computational Modeling of a Thermoplastic Polymer under Different Condition
Abstract not provided.
Process Structure Relationships in Metallurgical Joining and their Impact on Mechanical Response
Abstract not provided.
3D Materials Science at Sandia National Laboratories
Abstract not provided.
Data Visualization in the ICME Construct
Abstract not provided.
Resolving the evolution of pore structures in 304-L laser welds
Abstract not provided.
3D Deformation Field Throughout the Interior of Materials
Abstract not provided.
Dynamic high-temperature characterization of an iridium alloy in tension
Iridium alloys have been utilized as structural materials for certain high-temperature applications, due to their superior strength and ductility at elevated temperatures. The mechanical properties, including failure response at high strain rates and elevated temperatures of the iridium alloys need to be characterized to better understand high-speed impacts at elevated temperatures. A DOP-26 iridium alloy has been dynamically characterized in compression at elevated temperatures with high-temperature Kolsky compression bar techniques. However, the dynamic high-temperature compression tests were not able to provide sufficient dynamic high-temperature failure information of the iridium alloy. In this study, we modified current room-temperature Kolsky tension bar techniques for obtaining dynamic tensile stress-strain curves of the DOP-26 iridium alloy at two different strain rates (~1000 and ~3000 s-1) and temperatures (~750°C and ~1030°C). The effects of strain rate and temperature on the tensile stress-strain response of the iridium alloy were determined. The DOP-26 iridium alloy exhibited high ductility in stress-strain response that strongly depended on both strain rate and temperature.
Characterization of a Thermoplastic Polymer at Different Environments
Abstract not provided.
Characterization of Porosity and Mechanical Properties of Laser Welds
Abstract not provided.
Computational Modeling of a Thermoplastic Polymer under Different Condition
Abstract not provided.
Resolving the evolution of pore structures in 304-L laser welds
Abstract not provided.
Mechanical Characterization of Fiber Reinforced Polymer Composites
Abstract not provided.
Multiaxial Ductile Failure of Aluminum Alloys
Abstract not provided.
Assessing the Mechanical and Electrical Performance of Wear Tested Au-ZnO nanocomposites for Electrical Contact Applications (Invited)
Abstract not provided.
Resolving the evolution of pore structures in 304-L laser welds
Abstract not provided.
An Experimental Study of Ductile Failure Under Multi-axial Loading
Abstract not provided.
Porosity and Mechanical Characterization of Laser Welds
Abstract not provided.
In-situ XCT Experiments Conducted at Xradia (ZEISS)
Abstract not provided.
Wear Behavior of Au-ZnO Nanocomposite Films for Electrical Contacts
Surfaces & Coating Technologies
Abstract not provided.
AN EXPERIMENTAL STUDY OF DUCTILE FAILURE UNDER MULTI-AXIAL LOADING
Abstract not provided.
3D deformation field throughout the interior of materials
This report contains the one-year feasibility study for our three-year LDRD proposal that is aimed to develop an experimental technique to measure the 3D deformation fields inside a material body. In this feasibility study, we first apply Digital Volume Correlation (DVC) algorithm to pre-existing in-situ Xray Computed Tomography (XCT) image sets with pure rigid body translation. The calculated displacement field has very large random errors and low precision that are unacceptable. Then we enhance these tomography images by setting threshold of the intensity of each slice. DVC algorithm is able to obtain accurate deformation fields from these enhanced image sets and the deformation fields are consistent with the global mechanical loading that is applied to the specimen. Through this study, we prove that the internal markers inside the pre-existing tomography images of aluminum alloy can be enhanced and are suitable for DVC to calculate the deformation field throughout the material body.
An Investigation of Microscale Damage Evolution in High-Strength Al Alloy
Abstract not provided.
3D-DIC for Studying Material Failure under Multiaxial Loading
Abstract not provided.
An Investigation of Microscale Damage Evolution in High-Strength Al Alloy
Abstract not provided.
Results 26–50 of 110