Microstructures and Mechanical Properties of Equal Channel Angular Pressed 5083 Al Alloy
- Title
- Microstructures and Mechanical Properties of Equal Channel Angular Pressed 5083 Al Alloy
- Author
- 신동혁
- Keywords
- equal channel angular pressing; ultra-fine grain structure; 5083 aluminum alloy; microhardness; tensile properties; low temperature superplasticity
- Issue Date
- 2001-06
- Publisher
- JAPAN INST METALS & MATERIALS
- Citation
- MATERIALS TRANSACTIONS, v. 42, issue. 6, page. 1074-1080
- Abstract
- An ultra-fine grained (UFG) structure was introduced in a commercial 5083 Al alloy with an initial grain size of ∼ 200 \\micron using the equal channel angular pressing (ECAP) technique. ECAP was successfully conducted at 473 K on the same sample up to a total of 8 pressings through the die such that the sample was rotated 180° around its longitudinal axis between pressings. The microstructure was reasonably homogeneous after a single pressing and consisted of parallel bands of elongated substructure having an average width of 0.2 \\micron and an average length of 0.8 \\micron. An equiaxed ultra-fine grained structure of ∼ 0.3 \\micron was obtained in the present alloy after 4 pressings. The ultra-fine grains were thermally stable at 523 K . The yield stress of as-received 5083 Al alloy was 129 MPa, whereas it increased to 249 MPa after a single pressing and finally became 290 MPa after 8 pressings, which was superior to that of a conventional 5083-H321 Al alloy. In addition, in this study, the feasibility of low temperature superplasticity of a UFG 5083 Al alloy was examined. It was found that the 5083 Al alloy with a grain size of ∼ 0.3 \\micron exhibited a superplastic-like behavior with elongation to failure in excess of 200% below 523 K.
- URI
- https://www.jstage.jst.go.jp/article/matertrans/42/6/42_6_1074/_article/-char/enhttps://repository.hanyang.ac.kr/handle/20.500.11754/158357
- ISSN
- 1347-5320; 1345-9678
- DOI
- 10.2320/matertrans.42.1074
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML