Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-28T04:22:10.593Z Has data issue: false hasContentIssue false
  • English
  • Français

Diffusive transformation at high strain rate: On instantaneous dissolution of precipitates in aluminum alloy during adiabatic shear deformation

Published online by Cambridge University Press:  19 April 2016

Yang Yang ,
Shuhong Luo ,
Haibo Hu ,
Tiegang Tang  and
Qingming Zhang
Yang Yang*
Affiliation:
School of Material Science and Engineering, Central South University, Changsha, 410083, China; Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China; State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China; Key Laboratory of Ministry of Education for Nonferrous Metal Materials Science and Engineering, Central South University, Changsha, 410083, China
Shuhong Luo
Affiliation:
School of Material Science and Engineering, Central South University, Changsha, 410083, China
Haibo Hu
Affiliation:
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China
Tiegang Tang
Affiliation:
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China
Qingming Zhang
Affiliation:
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China
*
a) Address all correspondence to this author. e-mail: yangyanggroup@163.com
Get access

Abstract

Dynamic loading of the hat-shaped specimen of 2195-T6 aluminum lithium alloy was carried out with a split Hopkinson pressure bar at ambient temperature. The formation and evolution mechanisms of adiabatic shear band (ASB) in this alloy were investigated and then microstructure was further observed. The microstructure within ASB in 2195 aluminum alloy was characterized by means of optical microscopy and transmission electron microscopy. The width of ASB was about 20–30 um. Nano-grains (50–100 nm) were observed in the middle of shear zone. Experimental results show that the diffusive transformation took place within ASB during high strain rate deformation, namely the precipitates dissolving in the matrix in the process (within about 71 µs). Based on thermodynamics and kinetics analyses, dissolution of precipitates was firstly investigated during adiabatic shearing deformation, and a dissolution model was suggested in the present work. The diffusive transformation and the microstructure evolution within ASB in 2195 alloy were explained.

Keywords

adiabatic shearing deformationinstantaneous dissolution of precipitatesdiffusive transformation2195 aluminum alloy
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 9 , 14 May 2016 , pp. 1220 - 1228
Copyright
Copyright © Materials Research Society 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Kennedy, C. and Murr, L.E.: Comparison of tungsten heavy-alloy rod penetration into ductile and hard metal targets: Microstructural analysis and computer simulations. Mater. Sci. Eng., A 325, 131 (2002).Google Scholar
Xue, Q., Bingert, J.F., Henrie, B.L., and Gray, G.T. III: EBSD characterization of dynamic shear band regions in pre-shocked and as-received 304 stainless steels. Mater. Sci. Eng., A 473, 279 (2008).CrossRefGoogle Scholar
Yang, Y. and Wang, B.F.: Dynamic recrystallization in adiabatic shear band in α-titanium. Mater. Lett. 60, 2198 (2006).CrossRefGoogle Scholar
Meyers, M.A.: Dynamic Behavior of Materials (John Wiley & Sons, New York, 1994).Google Scholar
Duvall, G.E. and Graham, R.A.: Phase transitions under shock-wave loading. Rev. Mod. Phys. 49, 523 (1977).CrossRefGoogle Scholar
Yuan, F.P., Bian, X.D., Jiang, P., Yang, M.X., and Wu, X.L.: Dynamic shear response and evolution mechanisms of adiabatic shear band in an ultrafine-grained austenite–ferrite duplex steel. Mech. Mater. 89, 47 (2015).Google Scholar
Meyers, M.A., Xu, Y.B., Xue, Q., Pérez-Prado, M.T., and McNelley, T.R.: Microstructural evolution in adiabatic shear localization in stainless steel. Acta Mater. 51, 1307 (2003).Google Scholar
Wang, B.F. and Yang, Y.: Microstructure evolution in adiabatic shear band in fine-grain-sized Ti–3Al–5Mo–4.5V alloy. Mater. Sci. Eng., A 473, 306 (2008).Google Scholar
Xu, Y.B., Bai, Y.L., and Meyers, M.A.: Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys. J. Mater. Sci. Technol. 22, 737 (2006).Google Scholar
Yang, Y., Jiang, F., Zhou, B.M., Li, X.M., Zheng, H.G., and Zhang, Q.M.: Microstructural characterization and evolution mechanism of adiabatic shear band in a near beta-Ti alloy. Mater. Sci. Eng., A 528, 2787 (2011).CrossRefGoogle Scholar
Li, D.H., Yang, Y., Xu, T., Zheng, H.G., Zhu, Q.S., and Zhang, Q.M.: Observation of the microstructure in the adiabatic shear band of 7075 aluminum alloy. Mater. Sci. Eng., A 527, 3529 (2010).Google Scholar
Meyer, L.W., Manwaring, S., and Murr, L.E.: Metallurgical Applications of Shock-Wave and High-Strain-Rate Phenomena, Vol. 529 (Marcel Decker, New York, 1986).Google Scholar
Andrade, U., Meyers, M.A., and Vecchio, K.S.: Dynamic recrystallization in high-strain, high-strain-rate plastic deformation of copper. Acta Metall. Mater. 42, 3183 (1994).Google Scholar
Culver, R.S.: Thermal Instability Strain in Dynamic Plastic Deformation (Springer, US, 1973); pp. 519–530.Google Scholar
Yang, Y., Zhang, X.M., Li, Z.H., and Li, Q.Y.: Adiabatic shear band on the titanium side in the Ti/mild steel explosive cladding interface. Acta Mater. 44, 561 (1996).Google Scholar
Duvall, G.E.: Metallurgical Effects at High Strain Rates, 1st ed. (Plenum Press, New York, 1973); pp. 531–543.Google Scholar
Liu, Z., Bai, S., Zhou, X., Zhou, X.W., and Gu, Y.X.: On strain-induced dissolution of θ′ and θ particles in Al–Cu binary alloy during equal channel angular pressing. Mater. Sci. Eng., A 528, 2217 (2011).Google Scholar
Murayama, M., Horita, Z., and Hono, K.: Microstructure of two-phase Al–1.7 at% Cu alloy deformed by equal-channel angular pressing. Acta Mater. 49, 21 (2001).Google Scholar
Ma, F.C., Lu, W.J., Qin, J.N., and Zhang, D.: Microstructure evolution of near-α titanium alloys during thermomechanical processing. Mater. Sci. Eng., A 416, 59 (2006).Google Scholar
Wang, Y., Shao, W., and Zhen, L.: Dissolution behavior of δ phase and its effects on deformation mechanism of GH4169 alloy. Chin. J. of Nonferrous Met. 21, 341 (2011).Google Scholar
Zhang, H.Y., Zhang, S.H., Cheng, M., and Li, Z.X.: Deformation characteristics of δ phase in the delta-processed Inconel 718 alloy. Mater. Charact. 61, 49 (2010).Google Scholar
Wazzan, A.R. and Dorn, J.E.: Analysis of enhanced diffusivity in nickel. J. Appl. Phys. 36, 222 (1965).Google Scholar
Ruoff, A.L. and Balluffi, R.W.: Strain-enhanced diffusion in metals. II. Dislocation and grain-boundary short-circuiting models. J. Appl. Phys. 34, 1848 (2004).Google Scholar
Cohen, M.: Self-diffusion during plastic deformation. Trans. Jpn. Inst. Met. 11, 145 (1970).Google Scholar
Ivanisenko, Y., Lojkowski, W., Valiev, R.Z., and Fecht, H-J.: The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure torsion. Acta Mater. 51, 5555 (2003).Google Scholar
Ruoff, A.L.: Enhanced diffusion during plastic deformation by mechanical diffusion. J. Appl. Phys. 38, 3999 (2004).Google Scholar
Dolgopolov, N., Rodin, A., Simanov, A., and Gontar, I.: Cu diffusion along Al grain boundaries. Mater. Lett. 62, 4477 (2008).CrossRefGoogle Scholar