Effect of High-Energy Electro-Pulses on the Compression Deformation Behavior of Ti-6Al-4V Alloy

다국어 초록 (Multilingual Abstract)

Compression tests of Ti–6Al–4V alloy were conducted using an electron universal testing machine with discharge voltages that range from 50 V to 70 V and strain rate of 0.01 s −1 . Isothermal compression at equivalent temperatures was also performed on a universal testing machine with furnace, with the same strain rate. Results show that the deformability of Ti–6Al–4V alloy can be significantly improved by high-energy electro-pulses, and the deformation resistance and yield stress were also decreased. Moreover, the effect of high-energy electropulses on compression mechanical properties of Ti–6Al–4V alloy increased with increasing discharge voltage.
However, elongation and deformation resistance of compressions with high-energy electro-pulses were higher than isothermal compressions at equivalent temperatures. This result proved that the deformability improvement of Ti–6Al–4V alloy by high-energy electro-pulses results from the joint effects of temperature and electro-plasticity.
Fracture modes in different experimental conditions were analyzed by observing the fracture morphologies of specimens by using a scanning electron microscope. Under high-energy electro-pulses, the micro morphology of compression fracture changes from elongated oval to equiaxed dimples, and the fracture modes transfer from intergranular to transgranular fracture.

참고문헌 (Reference)

1 L. J. Huang, 489 : 330-, 2008

2 J. Adam, 221 : 1-, 2015

3 Y. G. Ko, 58 : 1094-, 2008

4 H. W. Li, 76 : 6-, 2013

5 B. Poorganji, 61 : 419-, 2009

6 Y. Niu, 492 : 24-, 2008

7 J. H. Kim, 485 : 601-, 2008

8 J. Guo, 79 : 100-, 2013

9 G. Wang, 27 : 893-, 2011

10 H. Yoshimura, 35 : 266-, 1994

11 S. Z. Zhang, 62 : 1151-, 2011

12 X. Ye, 98 : 147-, 2014

13 A. J. S. Egea, 214 : 2261-, 2014

14 Z. Zimniak, 8 : 173-, 2008

15 K. F. Yao, 45 : 533-, 2001

16 X. Li, 81 : 1799-, 2014

17 R. F. Zhu, 44 : 606-, 2013

18 H. Conrad, 287 : 227-, 2000

19 J. -H. Roh, 58 : 84-, 2014

20 J. Magargee, 135 : 041003-041001, 2013

21 J. J. Jones, 135 : 021011-021011, 2013

22 Z. S. Xu, 22 : 187-, 1988

23 H. Conrad, 322 : 100-, 2002

24 M. -J. Kim, 75 : 58-, 2014

25 X. -P. Lu, 27 : 2243-, 1992

26 X. Liu, 582 : 211-, 2013

27 W. Zhang, 15 : 2065-, 2000

28 L. Lu, 323 : 607-, 2009

29 R. D. Malucci, 175-, 2001

30 V. Imayev, 57 : 193-, 2007

31 T. Kuroda, 80 : 1331-, 2006

32 P. Rogeon, 195 : 117-, 2008

33 M. Nakamura, 9 : 150-, 1986

34 X. Y. Zhang, 31 : 2851-, 2010

35 S. F. Liu, 589 : 15-, 2014

36 T. Seshacharyulu, 325 : 112-, 2002

37 W. -S. Lee, 71 : 235-, 1997

38 V. Balasubramanian, 29 : 1459-, 2008

39 H. Conrad, 287 : 227-, 2000

40 L. Yao, 6 : 77-, 1996

41 S. Timoshenko, "Theory of Elasticity" McGraw Hill 124-126, 1951