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HPAM Moataz 4 - Coggle Diagram
HPAM Moataz 4
Powder Metallurgy
The process where metal powders are compacted into desired and often complex shapes and sintered to form a solid
Uses: Balls for ballpoint pens:pen:, :car:, magnetic materials, metal filters with controlled porosity, metal foams
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Mechanical alloying
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Flattened between two balls, second phase is impressed into the surface and eventually becomes dispersed
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Compaction
Increases density, greatly increases mech properties
CIP and HIP
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HIP
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:check:
- Mech properties are as good as forged
- Surface finish is as good as investment casting
- Flexible design
- Very little wastage and :arrow_down: time = cost saving
Design of parts
:red_cross: Sharp radii, reentry corners
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Thixomolding
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:check:
- Lower moulding temperatures
- Temp control at exit
- Elimination of most foundry operations
- Complex components directly from material
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Superplastic forming
Ability of polycrystalline material to exhibit very high tensile elongations prior to failure, generally in an isotropic manner
Requirements
Fine, equiaxed grain size, resistant to coarsening
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Applications: Car bodies, trains :racing_car: :car: :bullettrain_side:
Concerns :red_cross:
- Fusion welding
- Low forming rates, need back pressure
- High cost material preparation
- Combining SPF with current solid state joining techniques
Sintering
Solid State Transport
- Neck formation by diffusion
- Distance between centres decreases and particles are bonded
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