Deformation tests ( constant T )

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Deformation tests ( constant T )
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Constant strain rate testing
At our lab Electromechanical (Instron 1123 or
5567)
Servohydraulic Testing Machines (MTS 810)
Extensometer INSTRON 2630-014 (g.l. 10 mm,
range 50 )
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Constant strain rate behaviour
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... details at T 573 K (Th gt 0.6 ! For the
Al-alloy)
why not constant loading-rate experiment?
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Creep Testing top-lever machine
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Compression Test
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Creep behaviour
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The Monkman-Grant Relationship for time to
fracture
where 0.77ltmlt0.93 0.48ltBMGlt1.3 for Al, Cu, Ti,
Fe and Ni base alloys (from Monkman-Grant
research)
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Engineering Estimates of Creep Behaviour
Larson-Miller parameter (LM)
ksi