J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (1): 55-63.DOI: 10.1016/j.jmst.2018.09.007
• Orginal Article • Previous Articles Next Articles
Hailin Hbc, Youping Yiabc*(), Shiquan Huangabc, Yuxun Zhangab
Received:
2018-04-21
Revised:
2018-06-03
Accepted:
2018-06-23
Online:
2019-01-04
Published:
2019-01-15
Contact:
Yi Youping
Hailin H, Youping Yi, Shiquan Huang, Yuxun Zhang. An improved process for grain refinement of large 2219 Al alloy rings and its influence on mechanical properties[J]. J. Mater. Sci. Technol., 2019, 35(1): 55-63.
Fig. 4. EBSD images (a1, b1) and grain boundary misorientation distributions (a2, b2) of ring after radial-axial rolled under conventional (a1, a2) and improved (b1, b2) processes.
Fig. 7. Optical micrographs of heat-treated ring manufactured by improved process: (a) schematic of sampling locations; (b) OM microstructures at different locations.
Fig. 8. TEM bright-field images and corresponding SAED pattern showing matrix precipitates (a1, b1) and grain boundary precipitates (a2, b2) of T8-aged rings obtained near [001]Al zone axis under conventional (a1, a2) and improved (b1, b2) processes.
Fig. 10. SEM images of tensile-fractured surfaces of large 2219 Al alloy rings manufactured by two different processes: (a) conventional process; (b) improved process; (c) high magnification at intergranular cracking zones; (d) EDS analysis of particles.
Fig. 11. Schematic of crack propagation: (a) coarse grain structure produced by conventional process; (b) fine grain structure produced by improved process.
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