Uniaxial tension tensile impact

The flaw spectrum approach may be capable also of correlating failure data obtained under conditions which appear to give different material behavior. For example, tensile, Izod, and dart drop impact tests all give different impact energies or toughness measures. In part, this may be explained by the simple idea that a different fraction of flaws is active in each test. Equal biaxial loading (as in dart drop) and uniaxial tension (as in tensile impact) give rise to different flaw activities thus it is to be expected that the number of crazes produced in each test will be different. 

After test exposure, sample evaluation for hydrogen may include tensile, notched tensile, bend, ductility (for example, drawn cup), and/or impact Charpy tests, hydrogen analysis, or cross-sectional microstructural examination, or a combination thereof. Uniaxial, smooth-specimen tension testing is generally of litde value in diagnosing the subde embrittling effects of hydrogen. Titanium alloys tend to... 

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