期刊
METALS AND MATERIALS INTERNATIONAL
卷 24, 期 1, 页码 23-27出版社
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-017-6626-8
关键词
Ni2Si; intermetallics; aging; discontinuous cellular precipitation; shear band
资金
- Global Frontier R&D Program on Global Frontier Hybrid Interface Materials RD Center [2013M3A6B1078874]
- Ministry of Science, ICT and Future Planning
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2011-0030058, NRF-2015R1A5A1037627]
- National Research Foundation of Korea [2011-0030058, 2013M3A6B1078874, 21A20151713274] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The Cu-Ni-Si alloy is known as a precipitation hardening alloy, where the Ni2Si intermetallic compound is precipitated in the matrix during aging. There are two types of precipitation of Ni2Si: continuous and discontinuous cellular. The discontinuous cellular precipitation is generally initiated at interfaces especially grain boundaries in the matrix. To observe the grain boundary effect on the discontinuous precipitation, a large-grained Cu-Ni-Si-Ti alloy was intentionally fabricated by unidirectional solidification and plastically deformed by groove rolling. While discontinuous cellular precipitation has been generally known to occur only at the high angled grain boundaries in the alloys, we found that it was also generated inside the grains, at the deformation bands formed by plastic deformation.
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