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The static and dynamic mechanical properties of 20Zr-70Ti-6Al-4V alloy
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TG146.414,TG113.25

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    Abstract:

    This study aims to evaluate the static and dynamic mechanical properties of 20Zr-70Ti-6Al-4V alloy. The XRD, DSC, OM and SEM were used to test and analyze the phase transition and microstructural evolution of the 20Zr alloys subjected to different heat treatments. Dynamic compression tests were conducted by the SHPB(split Hopkinson pressure bar) to study the dynamic mechanical properties. The results showed that all 20Zr alloys were comprised of α and β phase and presented typical basketweave microstructures. At static conditions, the tensile strength was up to 1301 MPa., the plastic strain up to 14.9%, while the compressive strength was up to 1386 MPa. Under dynamic compression experiments, the dynamic compressive strength increased as the strain rate increased from 1000s-1 to 3000s-1, which reflected the strain hardening effect. In addition, the dynamic compressive strength and the plastic strain of 20Zr alloys undergoing the solid solution and aging treatment exceeded the anneal treated alloys. Besides, the failure of alloys resulted from the adiabatic shear bands.

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[Nie Yangyang, Cheng Xingwang, Nie Yukun, Liu Riping. The static and dynamic mechanical properties of 20Zr-70Ti-6Al-4V alloy[J]. Rare Metal Materials and Engineering,2018,47(4):1210~1215.]
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History
  • Received:April 01,2016
  • Revised:July 18,2016
  • Adopted:August 17,2016
  • Online: May 31,2018
  • Published: