An evaluation of the contributions of skin, pinch and heating effects to the electroplastic effect in titatnium

摘要: Abstract The stress drops expected from skin and pinch effects occurring during the application of direct current pulses order 103 - 104 A mm−2 for periods 55 μs tensile straining titanium at 77 300 K were calculated found to be small compared with total observed experimentally. temperature rise ΔT which occurs was determined by two methods: (a) drop in initial elastic region stress-strain curve; (b) Joule heating derived current-time profile a reasonable heat transfer coefficient. increase 2 96 as density increased 2000 10 000 K. associated these rises about 50–70% drops. It is concluded that remaining portion due an electron-dislocation interaction. Similar results obtained tests