Impact Charpy

The cast zinc—aluminum—copper slush alloy, after aging for ten years indoors, shows a tensile strength of 238 MPa (34,500 psi) with Charpy impact strengths of 1.4—4.1 J (1—3 ft4bf) (87). 

Samples S/B mole. b ratios Elongation at break, % Light transmittance, % Charpy impact strength, J /m Heat distortion temperature, °C... 

Figure 9.5. Graph showing that there is an approximate correlation between Izod and Charpy impact...

Figure 10.6. (a) Indentation nanohardness of silver/chromium multilayers and single films of the constituent metals, as a function of depth affected by plastic deformation, (b) Charpy impact energies, a measure of fracture toughness, of three materials, as a function of test temperature they are mild steel, ultrahigh-carbon steel and a composite of the two kinds of steel (courtesy Dr. J. Wadsworth) (Fig. 10.6(b) is from Kum et at. (1983)). 

Example 2.23 A series of Charpy impact tests on uPVC specimens with a range of crack depths gave the following results... 

Tensile and flexural properties were studied with an Instron 4204 testing machine. Tensile tests were performed on the drawn strands at a test speed of 3 mm/ min, while three-point-bending tests (ISO 178) at a speed of 5 mm/min were applied to the injection molded specimens. Charpy impact strength was measured of the unnotched samples with a Zwick 5102 pendulum-type testing machine using a span of 70 mm. The specimens (4 X 10 X 112 mm) used for three-point-bending tests were also used for the impact tests. It should be noted that neither the tensile tests for the strands nor the impact tests were standard tests. The samples were conditioned for 88 h at 23°C (50% r.h,) before testing. 

Figure 6 Effect of ABS weight percent on Charpy impact strength.

Table GR-2.1.3(d) Charpy Impact Test Temperature Reduction...

Actual Material Thickness [See Para. GR-2.1.4(c)[ or Charpy Impact Specimen Width Along the Notch [Note (1)] Temperature Reduction Below Design Minimum Temperature ... 

ISO 179, Parts 1 2, Plastics - Determination of Charpy impact properties, 1997-2000. 

The Izod and Charpy impact tests are mostly used. A defined pendulum strikes the specimen sample, notched or un-notched, clamped with a defined device. The absorbed energy is calculated and expressed ... 

Figure 4.10. Neat PP examples of Notched Charpy impact (kJ/mf) versus low and sub-zero temperatures (°C)...

Charpy impact strength (kJ/m ) Izod notched impact (J/m) 20-110 3-7 2-5 24-57... 

Fig. 6.3. A theoretical plot of fracture toughness, R, with variation of frictional shear stress, Tf, compared with experimental fracture toughness values (A) Charpy impact and (A) slow bend tests for carbon-epoxy composites ( ) Charpy impact and (O) slow bend tests for carbon polyester composites. After...

Kevlar-epoxy (0.5) PVAL coating 100 nil Charpy impact... 

Figure 8.15 Schematic illustration of Charpy impact test. Reprinted, by permission, from P. K. Mallick, Fiber-Reinforced Composites, p. 249. Copyright 1988 by Marcel Dekker, Inc.

Charpy impact test—a destructive test of impact resistance, consisting of placing the specimen in a horizontal position between two supports then striking the specimen with a pendulum striker swung from a fixed height. The magnitude of the blow is increased until specimen breaks. The result is expressed in in-lb or ft-lb of energy-... 

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