Grain refinement using equal channel angular extrusion in bulk sections of copper 101 and aluminum alloys 3003 and 6061 /
A new technique called Equal Channel Angular Extrusion (ECAE)
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Online Access: | Link to OAKTrust copy |
| Summary: | A new technique called Equal Channel Angular Extrusion (ECAE) aged material. For overaged material, these effects are aluminum alloys 3003 and 6061. Two types of refined annealing. Lower temperature deformation enhances strength are created which contain elongated subgrains that become Disoriented structure but does not refine grains more than a electron microscopy: one created through rotation facilitates the creation of an equiaxed, uniform and give the maximum properties. Evidence is presented that gm. The properties and grain size of the submicrostructured grain refinement to stabilize after four passes. For highest strength whereas route C produces the most stable inside the old grains which form a more equiaxed and uniform intense simple shear deformation promotes dynamic rotation inverted and the structure appears less strong, stable and. materials are equivalent to or better than those found in microstructure are distinguished by optical and transmission more equiaxed and misoriented as the number of extrusion multipass ECAE with billet orientation constant (route A) or number of ECAE passes causes strength to reach saturation and numbered pass, subgrains without shear bands are present other obtained after extrusion followed by annealing causing passes (route C), an unusual event is observed. At each even passes increases. For a billet rotation of 180' between recrystallization with a grain size of 0.2-0.5 gm and the recrystallization. In Al 3003 and Cu 101, increasing the rotated 90' between all passes (route B), a similar shear is applied to 1x1x6" billets of copper 101 and simple multipass operation. static migration recrystallization, with a grain size of 2-10 structural evolution is observed. Large angle shear bands structure than obtained via routes A or B. Route B gives the submicrostructure that is very stable after extrusion and submicrostructure. In Al 6061, pre-extrusion aging promotes the creation of a strong, uniform, equiaxed and misoriented thin sections of materials processed by conventional means to uniform. Multistep refinement with annealing between passes whereas the number of passes has a small influence on peak which produces intense and uniform deformation by simple |
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| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xvii, 130 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |