Effects of service temperature on tensile properties and microstructural evolution of CP titanium subjected to laser shock peening
作者： H.F. Lu , K.Y. Luo , L.J. Wu , C.Y. Cui , J.Z. Lu
DOI: 10.1016/J.JALLCOM.2018.08.161
关键词: Crystal twinning 、 Composite material 、 Ultimate tensile strength 、 Deformation (engineering) 、 Peening 、 Dislocation 、 Strain rate 、 Materials science 、 Elongation 、 Titanium
摘要: Abstract Effects of service temperature on the tensile properties and microstructural evolution specimens manufactured by commercial pure (CP) titanium subjected to laser shock peening (LSP) were investigated. Special attention was paid features at top surface close fracture zone failed LSPed 20 °C, 150 °C, 250 °C, 350 °C means transmission electron microscopy (TEM) observations. Results indicated that ultimate strength (UTS) gradually decreased, but area reduction elongation increased with increment temperature. Furthermore, influence mechanism CP consisted two modes: (a) ultra-high strain rate inhibited dislocation motion a lower which more prone occurrence deformation twinning, (b) easier activate higher temperature, making twinning disappear in plastic layer titanium.
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