DISPAL The Combination of Properties

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1 DISPAL The Combination of Properties DISPAL = low weight of Aluminum plus +...high strength (R m bis 750 MPa) +...improved fracture toughness (K IC up to max. 115 MPa m) +...high temperature strength (Rm=280 MPa) at working temperature up to 300 C +...high fatigue strength of 220 MPa by R=-1 and RT ( 180 MPa/ at T=150 C) +...improved stiffnes (youngs modulus up to 115 GPa) +...brilliant wear behaviour (Hard Coat not necessary) +...adjustable coefficient of thermal expansion = /K (~Steel) till = /K (~Aluminum/Magnesia) +...good thermal conductivity W/m/K +...good forging and machinable Seite 1

2 DISPAL Alloy Overview DISPAL Conventional Alloys Applications Specific Characteristics S220 F Aluminium, Copper Crankcase Linear Technology, Housings for Electrotechnologies Low Thermal Expansion (Comparable with Steel) S225 F Aluminium, Titanium, Steel Housings for Optical Industry, Measurement Technology Low Thermal Expansion (Comparable with Steel) S232 T6X Bronze/ Sinterstahl/ Stahl Oil Pump Gears, Spool, Connecting Rods Wear Resistant High Strength (T<170 C) S236 T6 Grey Cast Iron, Steel Bearing Caps Low Thermal Expansion, High Strength S250 F Aluminium, Titanium, Steel Supporting Plates, Construction Elements, Stiffeners Highly Heat Resisting up to 350 C S256 F Grey Cast Iron, Steel Bearing Caps Low Thermal Expansion, High Strength S260 F Alusil, Grey Cast Iron, Steel Liners, Pumphousings, Bushings Wear Resistant, Heat Conductive S270 F Steel, Titanium Pistons, Inlet Valves, Brake Caliper Wear Resistant, Heat Conductive Seite 2

3 DISPAL - Mechanical Properties (Ø30 mm) DISPAL UTS Yield Strength Elongation A5 (%) Hardness HV C (10-6 /K) Young s Modulus (GPa) Density (g/cm 3 ) Fatique Strength (RT; MPa) S220 F , ,1 85 2,54 S225 F , ,1 86 2,58 S250 F , ,9 95 2,78 Physical properties depend on geometry and production process. All mechanical properties are minuinmal values taken from specimen Ø 30 mm and for all other geomtries only for reference. Fatigue (bending) RT, R=-1 for P=50% at 5x10^7 cycles. Page 3

4 DISPAL - Mechanical Properties (Ø30 mm) DISPAL UTS Yield Strength Elongation A5 (%) Hardness HV C (10-6 /K) Young s Modulus (GPa) Density (g/cm 3 ) Fatique Strength (RT; MPa) S220 F , ,1 85 2,54 S225 F , ,1 86 2,58 S250 F , ,9 95 2,78 S236 F , ,83 S260 F , ,2 85 2,66 Physical properties depend on geometry and production process. All mechanical properties are minuinmal values taken from specimen Ø 30 mm and for all other geomtries only for reference. Fatigue (bending) RT, R=-1 for P=50% at 5x10^7 cycles. Page 4

5 DISPAL - Mechanical Properties (Ø30 mm) DISPAL UTS Yield Strength Elongation A5 (%) Hardness HV C (10-6 /K) Young s Modulus (GPa) Density (g/cm 3 ) Fatique Strength (RT; MPa) S220 F , ,1 85 2,54 S225 F , ,1 86 2,58 S250 F , ,9 95 2,78 S236 F , ,83 S260 F , ,2 85 2,66 Physical properties depend on geometry and production process. All mechanical properties are minuinmal values taken from specimen Ø 30 mm and for all other geomtries only for reference. Fatigue (bending) RT, R=-1 for P=50% at 5x10^7 cycles. Page 5

6 Low Expansion Seite 6

7 Coefficient of Thermal Expansion (10-6 1/K) Properties Thermal Expansion Reduced CTE due to Silicon and Dispersoides 35 N. Hort et al Mg S790 S %SiC %SiC Cu MDS20 MDS20 + Al2O3 AlSi17CuNiMg S232 S260 S250 S270 S263 S264 S250 + SiC Al-Base S220 S226 S225 S-AlSi40 PEAK Datablätter ASM Metals Handbook Si-Base 10 Ti Si-content (wt.-%) Seite 7

8 Hot strength Seite 8

9 Yield strength Hot strength Properties improvement at elevated temperatures by dispersoids Dispersion Hardening DISPAL S MPa +100 C DISPAL S270 T Precipitation Hardening 2014 T6 wrought alloy Temperature ( C) Seite 9

10 DISPAL High Stiffness Seite 10

11 Youngs-Modulus (GPa) DISPAL High Young s modulus by Silicon and Dispersion Hardening ,5 GPa GPa 95 DISPAL S270 DISPAL S268 High Stiffness DISPAL S220 F 85 Gpa DISPAL S225 F 86 Gpa DISPAL S250 F 95 Gpa DISPAL S256 F 107 GPa DISPAL S236 T6 105 GPa (by tensile test) GPa DISPAL S GPa Heating & cooling rate 2 C/min AA Temperature ( C) Seite 11

12 Young`s modulus (GPa) High Stiffness Young s modulus and damping behaviour GPa S270 GJL25 experimental alloy, spray-formed S250+10%SiC = DISPAL S232 T6 conv. Al-alloys S250 S226 T6 S691 T4 S691 T6 S225 brass S220 M230 Resonant Frequency and Damping Analyser (RFDA) from Dooris, A., Lakes, R. S., Myers, B. and Stephens, N., "High damping indium-tin alloys", Mechanics of Time Dependent Materials, 3, (1999) ,0001 0,001 tan d 0, x(t) d f Krug et al ASTM E-1876 ASTM C-1259 t Seite 12

13 DISPAL - materials Rm Rp0,2 A5 (%) HV30 (10-6 /K) Young s modulus (GPa) density (g/cm 3 ) S220 F , ,6 S225 F , ,6 S232 T6X , ,8 S250 F , ,8 S693 T , ,8 The physical and mechanical properties depend on geometry and the production process. All mechanical properties are minimal values (average minus 3 Sigma) taken from specimen Ø30mm and for all other geometries only for reference. 30mm Seite 13

14 DISPAL Alloy Range Optimized for Performance S220 AlSi35 Lowest Density S225 AlSi35Fe2Ni Lowest Thermal Expansion S232 AlSi17Fe4Cu3Mg Strength, Fatigue and Wear Resistance S250 AlSi20Fe5Ni2 High Temperature Strength S260 AlSi25Cu4Mg Wear Resistance S270 AlSi25Fe4Ni3CuMgMnCrTi Highest Strength and Stiffness - High Temp. Seite 14

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