4.7 Article

Controlling texture in magnesium alloy sheet by shear-based deformation processing

Journal

ACTA MATERIALIA
Volume 61, Issue 18, Pages 6843-6856

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2013.07.063

Keywords

Magnesium; Shear deformation; Texture; Machining; Ultrafme-grained

Funding

  1. DOE [NNL-DE-AC06-76RL01830]
  2. NSF [CMMI 1100712, 1234961, 0928337]
  3. US ARO Grant [W911NF-12-1-0012]
  4. Div Of Civil, Mechanical, & Manufact Inn
  5. Directorate For Engineering [0928337] Funding Source: National Science Foundation
  6. Div Of Civil, Mechanical, & Manufact Inn
  7. Directorate For Engineering [1100712, 1234961] Funding Source: National Science Foundation

Ask authors/readers for more resources

Constrained chip (sheet) formation by large strain extrusion machining is used to impose effective strains of similar to 1 in Mg alloy AZ31B sheet in a single step of deformation. High-speed image analysis shows the deformation underlying sheet formation to be simple shear that is confined to a narrow zone. This confinement of the deformation limits the need for pre-heating of the workpiece to realize continuous sheet forms. Tilted-basal textures, wherein the basal poles are inclined from the sheet surface normal, are achieved by this processing. These textures are quite different from those prevalent in rolled sheet. By controlling the strain path, the basal pole inclination could be varied in the range 32-53 degrees. The primary texture component is the B-fiber, indicating basal slip to be the main deformation mode over the temperature range 165-400 degrees C. An additional C2-fiber component appears above 250 degrees C due to the activation of pyramidal (c + a) slip. In conjunction with these textures, microstructures ranging from ultrafine-grained nm) to fine-grained gm) could be obtained by controlling the deformation temperature. Implications of the results for production of Mg sheet are discussed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available