shipshape project: net shape hot isostatic pressing...
TRANSCRIPT
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SHIPSHAPE Project: Net Shape Hot Isostatic Pressing (HIP) of
advanced materials and structures
Robin Young Applied Materials Technology Ltd
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SHIPSHAPE PROJECT - SHAPED SHELLS FOR HOT ISOSTATIC PRESSING
£450K Collaborative Funded by InnovateUK: 2 year programme Technology Inspired Collaborative R&D – Advanced Materials Sustainability and Materials Security theme
SHIPSHAPE unlocks the commercial potential of the Powder-HIP process by producing a sacrificial metal canister filled with fine metallic powder for consolidation at high pressure and temperature, in a Hot Isostatic Pressure (HIP) vessel, to form a fully dense part.
Powder-HIP provides an effective method of producing complex, high performance metal parts, with little or no material waste, making it particularly attractive for processing high value, scarce materials (such as nickel superalloys and Ti64, hardmetals and Metal Matrix Composites)
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Electrolytics and Electrolytics Cu – Ni – Sn - 49s Gold Silver - Platinum Group - Ruthenium - Blacks – Indium - Lead Solder process for metallic foams - plastics/ composites - transient liquid phase
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Aerospace Example
Development of a process for well adhered and precision thickness plating to facilitate hermetic liquid phase bonding in heat exchanger
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Robin Young, Applied Materials Technology Lee Marston, FiberStone Products Rob Hewitt, AIM-Altitude Tim Swait, AMRC with Boeing
Prototype Electroformed Tools for Composites (PERFORM)
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SHIPSHAPE PROJECT – HOT ISOSTATIC PRESSING
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SHIPSHAPE PROJECT - SHAPED SHELLS FOR HOT ISOSTATIC PRESSING
Trade off with ALM Cost: Advantages with scale Performance: Material integrity/uniformity Design complexity: Similar to investment casting *
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SHIPSHAPE PROJECT - SHAPED SHELLS FOR HOT ISOSTATIC PRESSING
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SHIPSHAPE PROJECT - SHAPED SHELLS FOR HOT ISOSTATIC PRESSING
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Shell Options
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Division of Project
o POWDER SUPPLY: LPW / Total Carbides / Materion
o Mandrel and Electroform Development AMT
o Leak testing: AMT/CVE
o Project management MTC
o HIP processing and assessment: Materion
o Geometry evolution (GOM scanning) MTC
o Cost Modelling MTC
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Technical Challenges and Issues
Group 1 oHermetic can - thickness – structure – pin holes oStress in plating - process trade offs oMetallurgical compatibility
Group 2: oMandrel technology oStripping mandrel oStripping can
Group 3: oProcess consistency at fill stage oShape stability through process (can stress, thickness, geometry) Further work: Core technologies and shape modelling
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CAPACITY LIMITS
Development tanks at AMT now: small 500 * 500 * 1000 mm Useable: 70% of volume Large: 1500 * 800 * 800 mm (scalable but critical ) HIP: Not a problem…
Courtesy Quintus Technology)
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MANDRELS
Different processes to suit different volumes: o Low volume - additive manufacture ideal. Some compatibility issues. FDM used for basic work. ALM and SLA offer some benefits (more expensive) Thermajet printing of waxes; machining of waxes o Medium volumes: Wax injection using soft tooling o High volumes: Injection moulding with hard tooling
WAXES PREFERRED – Good supply chain for investment casting; strip with autoclave; recyclel disadvantage is thermal expansion and softening at plating temperatures
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Examples of shells on wax and plastic
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Demonsator brackets
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Nickel shells with feed/crimp tubes welded
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After HIP Processing
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Densified part left and shell (right)
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Linear shrinkage in line with expected shrinkage from consolidation of tap density powder
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COST MODELLING - in process
o Comparison with fabricated cans
oTrade off with shell thickness leakage rate (technology sensitive o Not likely to be advantageous for simple geometries
o Large impellers are a natural application area
o Combustors, Ni base alloys, Ti structures
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SUMMARY o Demonstrated with Nickel 713, Stainless Steel, Ti 6-4,
Stellite (other alloy systems underway)
o Comparison with fabricated cans - not likely to be advantageous for simple geometries
o Large impellers or blades are a natural application area
o Combustors, Ni base alloys, Ti structures
o R&D focus on improving hermetic performance and
demonstration of parts with higher complexity