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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Mechanical Characteristics and Application Properties of Metals and Non-metals for Technology: An EPD Symposium in Honor of Donato Firrao
Presentation Title Finding the Small Charge Explosion Center by Analyzing Occurrence of Mechanical Twins in FCC Metals
Author(s) Donato Firrao, Paolo Matteis, Graziano Ubertalli
On-Site Speaker (Planned) Donato Firrao
Abstract Scope Metals exposed to explosions undergo macro-deformations and/or micro-crystal structure variations, such as slip bands or mechanical twins, depending on the charge and distance from it. Twinning or slip occurrence depends on metal stacking fault energy, blast wave pressure and deformation rate. An experimental campaign was performed on different FCC metals by submitting them to small charge explosions with varying target-to-charge distances. Observation results on exposed surfaces of austenitic stainless steels, gold alloys, copper and α-brass (30% Zn), and aluminum alloys specimens subjected to the explosion of 50 g and 100 g of plastic explosive are presented. Cross section analyses are also presented in a few cases. Optical and Electron Microscopy, Electron Back-Scattered Diffraction (EBSD) imaging, and X-ray diffraction allowed to establish the target-to-charge distance detectability limit, and hence the bomb unknown position in real cases, when explosion related mechanical twins are found in metal objects retrieved on the crime scene.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Corrosion Micro-scale Features and Alloy Microstructure Effects on Fatigue Initiation of AA7050-T7451
Creep-oxidation-small Fatigue Crack Interaction in Grade 91 Steel
Ductile Fracture Assessment of Hot Isostatically Pressed Stainless Steel Using 3D X-ray Computed Tomography
Effect of Initial As-cast Structure on the Evolution of Microstructure and Texture and Finally Ridging Behavior of Ferritic Stainless Steel
Effect of NaNO2 in Corrosion Inhibition of Micro-alloyed Steel in E20 and E40 Simulated Fuel Grade Ethanol Environment
Embrittlement in Cast Superaustenitic Stainless Steel
Fatigue Behavior of Metastable Austenitic Stainless Steel AISI 304 under Different Test Frequencies
Finding the Small Charge Explosion Center by Analyzing Occurrence of Mechanical Twins in FCC Metals
Flow Behavior of High Strength Aluminum Alloy after Cold Rolling
Friction and Wear Characteristics of 304 Stainless and Rolled Upper Bainitic Rail Steels
Hot Ductility of X70 Pipeline Steel in Continuous Casting
Influence of Surface and Near Surface Defects Caused by Laser Beam Cutting on the Fatigue Behavior of Plate-like Shaped Parts Made of Metastable Austenitic Stainless Steel AISI 304
Inhibitive Influence of Cephalexin Compound on Degradation Characteristics of Mild Steel in NaCl Medium
Integration of Metallography, Fractography and Mechanical Properties Tests as a Key to Failure Analysis of Quenched and Tempered Large Steel Components
Microstructure and Mechanical Properties of Low-carbon Ferritic and Bainitic Steels with Different Contents of Mo, Ti and Nb for Seismic and Fire-resistant Applications
N-12: Alumina Feeding System Changes in Aluminum Electrochemical Cell with D18 Technology for Energy Efficiency (Case Study: Almahdi- Hormozal Aluminum Smelter)
N-13: Young’s Modulus and Hardness of Metal Amorphous Nanocomposites (MANCS) Determined by Nanoindentation
Production of Cu2O Powder Using Electrodeposition Method
Quench Embrittlement and Intergranular Fracture in High Carbon Steels
Sensitization Effects on Environmentally-assisted Cracking in 5XXX Al Alloys
Tensile Behavior and Microstructure of TWIP Steels from Low to Warm Temperatures
Thermo-Calc of the Phase Diagrams of the Nb-N System
Welding Between Steels and Aluminum Alloys for Hybrid Car-body Applications

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