Abstract
A thin-type manganin piezoresistance gauge was calibrated for the highly time-resolved measurements of the stress histories under shock compression of solids in the several 10 s of GPa region. The final total gauge thickness can be reduced to 25-30 µm to improve time resolution. The calibration experiments were performed using alumina stress medium by means of the inclined-mirror method using a new high-speed streak camera combined with a powder gun. The stress histories in alumina polycrystal were measured, in which the elastoplastic transitions were detected at rise and release. The relationship between the resistance change and shock stress was closely described as ΔR/R0=-0.0329+0.0276σx (R0: zero pressure resistance, ΔR: resistance change, and σx: peak shock stress). It was confirmed that the present modified gauge was applicable in the pressure range up to over 40 GPa.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
