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Meeting Materials Science & Technology 2019
Symposium Mechanochemical Synthesis and Reactions in Materials Science IV
Presentation Title A Mechanochemical Effect in Cutting of Ductile Metals
Author(s) Anirudh Udupa, Tatsuya Sugihara, Jason Davis, Mojib Saei, James Mann, Srinivasan Chandrasekar, Kevin P. Trumble
On-Site Speaker (Planned) Kevin P. Trumble
Abstract Scope It has long been known that highly strain hardening metals such as aluminum, copper and tantalum; and stainless steels, are quite difficult to cut, despite being relatively soft, earning them the moniker “gummy.” We examine this problem using high-speed, in situ imaging, complemented by force measurements. We show that the problem arises from the tendency of these metals to undergo a highly unsteady mode of large-strain plastic deformation - sinuous flow - characterized by large-amplitude folding. Sinuous flow can be suppressed by utilization of surface-active adsorptive media (e.g., inks, alcohols, organometallics) that effect a local ductile-to-brittle transition – a mechanochemical effect in large-strain deformation. The use of this effect greatly facilitates the cutting of these metals. Interestingly, the manifestation of the effect is coupled to the sinuous flow mode. Implications for comminution, milling and machining of these metals and potential screening of active media using this experimental approach are discussed.
Proceedings Inclusion? Planned: Other (journal publication, etc.; describe below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Mechanochemical Effect in Cutting of Ductile Metals
Easy Access to Copper-antimony Mixed Sulfides (CuxSbySz): Mechanochemical Synthesis, and Structural and Surface Analysis
Effect on Phase Evolution and Thermal Stability of Mechanically Alloyed AlCoCrFeNi High-entropy Alloy on Addition of Mn and Ti
First Hydrogenation Characteristic of TiFe + 4wt% Zr + 2wt% Mn Alloy after Air Exposure and Reactivation by Mechanical Treatment
In-situ Synthesis of AlN-CNT Nanocomposites by Mechanochemical Reaction of Al and Melamine
Influence of Al Addition on Phase Evolution and Thermal Stability of CoCrFeNiTi High-entropy Alloy Processed by Mechanical Alloying
Mechanically Activated Combustion Synthesis of Nb5Si3/Nb Composites
Mechanically Activated SHS of Silicon-based Nanostructured Materials
Mechanically Alloyed Nanostructured Steels
Mechanically Driven Phase Transformation in Sn Reinforced Al-Cu-Fe Quasicrystalline Matrix Nanocomposite: Influence of Mechanical Milling and Cryomilling
Metallic Glasses Reinforced Al Alloy Matrix Composites
Nanocrystalline Maraging Steel Powder Fabricated by Mechanical Milling and their Thermal Stability
Neutron Total Scattering Analysis of Materials Processed by Far-from-equilibrium Methods
P2-64: Ionic Conductors Synthesized by Mechanochemistry: Exploring the ZrO2-Y2O3-Gd2O3 System.

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