Diffusive transformation at high strain rate: On instantaneous dissolution of precipitates in aluminum alloy during adiabatic shear deformation
Source abstract
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.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Velocity Impact and Material Behavior · Microstructure and mechanical properties · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
Show source-provided references
1. 10.1016/S1359-6454(02)00526-810.1016/S1359-6454(02)00526-8 ↗
2. 10.1016/S1359-6454(03)00419-110.1016/S1359-6454(03)00419-1 ↗
3. 10.1063/1.170905610.1063/1.1709056 ↗
4. 10.1016/j.msea.2010.12.05310.1016/j.msea.2010.12.053 ↗
5. 10.1016/j.matchar.2009.10.00310.1016/j.matchar.2009.10.003 ↗
6. 10.1016/j.msea.2010.12.06010.1016/j.msea.2010.12.060 ↗
7. 10.1063/1.172969810.1063/1.1729698 ↗
8. Meyer · 1986 · 529
9. Duvall · 1973 · 531
10. 10.1016/1359-6454(95)00200-610.1016/1359-6454(95)00200-6 ↗
11. Culver · 1973 · 519
12. 10.1016/S0921-5093(01)01449-610.1016/S0921-5093(01)01449-6 ↗
13. 10.1016/j.matlet.2008.07.05910.1016/j.matlet.2008.07.059 ↗
14. 10.2320/matertrans1960.11.14510.2320/matertrans1960.11.145 ↗
15. 10.1016/j.matlet.2005.12.09710.1016/j.matlet.2005.12.097 ↗
16. 10.1002/978047017227810.1002/9780470172278 ↗
17. 10.1016/j.msea.2010.02.02410.1016/j.msea.2010.02.024 ↗
18. Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys
19. 10.1016/j.msea.2005.09.08210.1016/j.msea.2005.09.082 ↗
20. Dissolution behavior of δ phase and its effects on deformation mechanism of GH4169 alloy
21. 10.1016/j.msea.2007.04.04810.1016/j.msea.2007.04.048 ↗
22. 10.1016/j.msea.2007.03.07310.1016/j.msea.2007.03.073 ↗
23. 10.1103/RevModPhys.49.52310.1103/RevModPhys.49.523 ↗
24. 10.1016/j.mechmat.2015.06.00410.1016/j.mechmat.2015.06.004 ↗
25. 10.1016/S1359-6454(00)00308-610.1016/S1359-6454(00)00308-6 ↗
26. 10.1063/1.171388010.1063/1.1713880 ↗
27. 10.1016/0956-7151(94)90417-010.1016/0956-7151(94)90417-0 ↗