Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
A Method of Producing Foils using LSEM Fixture
Technology Category/Market
Technology: Producig foils using LSEM fixture
Category: Advance Material & Manufacturing
Industry: Manufacturing
Application: Automotive, Machine tool
Market: The global market size was estimated at USD 92.78 billion in 2023 and is anticipated to grow at a CAGR of 5.8% from 2024 to 2030.
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Problem Statement
- Nanocrystalline (grain size < 100 nm) and ultra-fine-grained (grain size between 100 nm and 1000 nm) materials are characterized by superior mechanical properties vis-a-vis their conventional counterparts.
- Large strain extrusion machining (LSEM) is a severe plastic deformation process used to produce nano crystalline and ultra-fine-grained chips or shavings due to its enhanced mechanical properties, including hardness, strength, ductility, fracture toughness, fatigue life, and wear resistance.
- Furthermore, this process has the potential to be a low-cost alternative for the production of fine grained chips in the form of sheets, foils, and rods especially from high strength metals and alloys.
Technology
- A fixture for holding a cutting tool to provide constraint during large strain extrusion machining (LSEM) with higher chip compression ratio to produce fine-grained foils, characterized by:-
- A Ti-6AI-4V plate with a strong transverse texture which is suitably textured by the cold-rolling process to suppress shear localization in the extrusion-machined foils.
- A fixture with a wedge-shaped slot provided to facilitate the flow of foils, and
- A cutting tool positioned in the fixture with a groove type restricted contact for performing large strain extrusion machining.
Key Features/Value Proposition
“Suppressing Shear Localization in Ti-6Al-4V”
- Modification of fixture in Ti-6Al-4V via cold-rolling.
- Extrusion-machining of textured plates using higher compression ratio.
- Fine-grained continuous foils with increased hardness.
- Reduced friction during extrusion-machining.
Fixture Features:
- Chip compression ratio: 1.4
- EN8 tool holder with brazed tungsten carbide insert.
- The fixture was employed to produce low cost ultra fine grained Ti-6Al-4V foils from its bulk.
- Having design and fabrication of a fixture which acts as a constraint during large strain extrusion machining process
Questions about this Technology?
Contact for Licensing
Research Lab
Prof. Murthy H S N
Department of Aerospace Engineering
Prof. Balakrishna C Rao
Department of Engineering Design
Intellectual Property
- IITM IDF Ref. 1386
- Patent No: IN 365294
Technology Readiness Level
TRL-4
Experimentally validated in Lab;