Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 752, Issue -, Pages 18-23Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2019.02.073
Keywords
Cu-15Ni-8Sn; Dynamic strain aging; Dynamic precipitation; Electron microscopy
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Funding
- National Key R&D Program of China [2017YFB0306100]
- Project of Hunan Scientific and Technical Innovation Plan [2019JJ70058]
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha
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The microstructure and subsequent re-aging behavior of Cu-15Ni-8Sn alloy pre-deformed with dynamic strain aging (DSA) were investigated. The results show that DSA has an inhibitory effect on spinodal decomposition and result in the segregation and clustering of Sn and Ni, and eventually leads to the precipitation of Ni3Sn. DSA pre-treatment can significantly shorten the peak aging time of re-aging process since the precipitation of the strengthening phases grow directly from the dynamically precipitated nanoparticles in the previous DSA without time-consuming spinodal decomposition and nucleation.
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