期刊
MATERIALS RESEARCH LETTERS
卷 1, 期 1, 页码 51-60出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2012.761654
关键词
Aluminum; Interfaces; Mechanical Properties; Silver; Twin Boundaries
资金
- NSF-DMR metallic materials and nanostructures program [0644835]
- NSF-DMR grant [0846504]
- Center for Integrated Nanotechnologies, a US Department of Energy, Office of Basic Energy Sciences user facility at Los Alamos National Laboratory [DE-AC52-06NA25396]
- Office of Science, Office of Basic Energy Sciences of the US Department of Energy [DE-AC02-05CH11231]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0644835] Funding Source: National Science Foundation
Nanotwins readily form in numerous face-centered-cubic (fcc) metals with low stacking-fault energy (SFE). However, growth twins rarely form in Al due to its high SFE, similar to 120-165 mJ/m(2). Here, using thin inter-layers or buffer layers of a low-SFE fcc metal (Ag), we overcome the SFE barrier and successfully grow high-density coherent and incoherent twin boundaries into Al. We identify three mechanisms that induce growth twins in Al and demonstrate enhanced mechanical strength in twinned Al. This study reveals an effective means that may be generalized to control growth twin formation in fcc metals with high SFE.
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