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The orientation spreading in γ-fiber of electron beam melted Ta-2.5W alloy during cold rolling
- Source :
- Journal of Alloys and Compounds. 699:57-67
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The work presents a detailed investigation of the microstructure characteristics of the γ-fiber (normal direction// ) in electron beam melted Ta-2.5W alloy subjected to cold rolling. With increasing strain, the average space of microbands decreases towards a saturation value which is about 0.5 μm. The typical microstructure in γ fiber is microbands and shear bands in different appearance. The microbands are relatively straight and aligned close with slip planes when the strain is lower than 60%. The non-crystallographic irregular microbands and shear bands prevail in γ fiber when the strain is larger than 70%. When the strain reaches 90%, a group of parallel macroshear bands are formed. The orientation of γ fiber can spread up to 60°. Both {111} and {001} new orientations are developed in {111} orientation. Many new developed high angle boundaries of these new grains are coincident site lattice boundaries (Σ3 and Σ9). Meanwhile, these new grains and matrix always share a common or with matrix.
- Subjects :
- Materials science
020502 materials
Mechanical Engineering
Metallurgy
Alloy
Metals and Alloys
02 engineering and technology
engineering.material
021001 nanoscience & nanotechnology
Microstructure
0205 materials engineering
Mechanics of Materials
Coincident
Lattice (order)
Materials Chemistry
Cathode ray
engineering
High angle
Composite material
0210 nano-technology
Normal
Saturation (magnetic)
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 699
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........7c27aecd286340adede3e732d9fa2975