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|Title: ||Effects of processing parameters on relative density, microhardness and microstructure of recycled Ti-6Al-4V from machining chips produced by equal channel angular pressing|
|Authors: ||Shi, Qi (Alex)|
Tse, Yau Yau
Higginson, Rebecca L.
Equal channel angular pressing
|Issue Date: ||2016|
|Publisher: ||© Elsevier|
|Citation: ||SHI, Q., TSE, Y.Y. and HIGGINSON, R.L., 2016. Effects of processing parameters on relative density, microhardness and microstructure of recycled Ti-6Al-4V from machining chips produced by equal channel angular pressing. Materials Science and Engineering A, 651, pp. 248 - 258|
|Abstract: ||Ti-6Al-4V was recycled from machining chips by using equal channel angular pressing (ECAP). Samples were pressed through a die up to 8 passes at moderate temperatures in the range of 400-500 °C. The ECAP process was accomplished with back-pressures ranging from 50 to 250. MPa. The results demonstrate that ECAP with back-pressures allows the consolidation of machining chips to near fully dense (~99.9%) recycled products. The relative density of the as-recycled samples increased with the applied back-pressure and number of passes. The average hardness and homogeneity were improved as the number of passes increased. The transmission electron microscopy reveals a combination of equiaxed and elongated α grains after the first pass. With subsequent pressing, the samples were dominated by nano-equiaxed α grains with diameters of ~70 nm. The original β phase in the machining chips was fragmented during the ECAP process.|
|Description: ||This article is closed access.|
|Publisher Link: ||http://dx.doi.org/10.1016/j.msea.2015.11.002|
|Appears in Collections:||Closed Access (Materials)|
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