Commercially available Tungsten Plates

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Presentation transcript:

Commercially available Tungsten Plates Cime Bocuze (St Pierre-en Faucigny, France) Plansee (Reutte, Austria) W. Klempt CERN/PH W HCAL Prototype meeting in Annecy 24/9/2009

W Composite Material (Cime Bocuze) Consist of W (≥ 90%) rest mixture of (Fe), Ni, Cu …  = 17 – 18 g/cm3 Λ ≈ 10 cm, X0 ≈ 0.4 cm Well established production procedure Easy to machine (i.e. sawing/cuting of plates) 1500 °C

Product Range and Material Properties

Mechanical Properties

Pure Tungsten Plate Production (Plansee) Produce ingots (weight ≤ 500kg) Sintering temp. 2000-2500 °C Roll to final thickness 2000-2500 °C

Mechanical Properties of Pure Tungsten Sintered Tungsten exhibits low ductility (is rather brittle) at room temperature. Its mechanical properties are situated somewhere between metals and ceramics and are very dependent on small (~ 1%) admixtures (Re, La2O3 etc. ) It’s Young’s modulus is known (≈2 x ESS) But it is not easy to get other engineering values like: stress- strain diagram, tensile strength, fracture elongation etc.. A single load test will not give enough information, other series of measurements are needed; Plansee is willing to help us with these values

Comparison of Mechanical Properties Pure W INERMET 176* Steel % Tungsten 100 92.5 - Alloying materials Cu, Ni Elasticity (Young) [GPa] 400 350 200 Density [g/cm3] 19.3 17.6 7.85 Elongation at yield < 5%** 5% 30%-50% *Alloys used must be paramagnetic, **Tests required

Plate size and tolerances Currently available plate sizes Pure Tungsten INERMET 1200 mm x 1600 mm 600 mm x 600 mm Thickness of 12 mm is feasible for both Flatness tolerance ca. 1.5 mm ≤ 1 mm possible Thickness tolerance ± 0.5 mm With machining ± 0.1 mm (cost ↑)

Machinability Abrasive water jet cutting is suitable Holes, slots & various cut-outs are possible Precision of ± 0.1 mm is possible (but very expensive)

Magnetic properties of Densimet 180

Magnetic properties of Densimet 180 μ