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Mechanical Testing |
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Mechanical Testing |
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Ram-tensile Testing The standard mechanical test that HEMI uses to determine bond strength is the ram-tensile test. Shown in the schematic below, a specimen is machined from a bonded plate with a hole through the bond on one side. The opposite side has a larger diameter turned through the bond. This allows the specimen to sit in the testing fixture and the ram pressure forces apart the bond in tension. A before and after picture of an aluminum/stainless sample is shown in Figures 1 and 2. |
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Figure 1. Ram-tensile sample |
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Figure 2. Fractured Ram-tensile sample |
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Shear Testing Shear testing is also performed at HEMI to determine a shear strength of the clad material. This can be difficult with very thin clads (<.062") but the test specimen and fixture shown in Figure 3 are easily fabricated and give reliable accurate results. |
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Figure 3. Schematic of shear test specimen & fixture |
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Figure 4. Al/SS shear test, 19,400 psi |
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