Journal
MATERIALS LETTERS
Volume 328, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.133097
Keywords
Cast; Grain refinement; Heritability; Mechanical properties; Cu-15Ni-8Sn alloys
Funding
- National Natural Science Foundation of China [51904184, U1860202, U1732276]
- Independent Research and Development Project of State Key Laboratory of Advanced Special Steel
- Science and Technology Commission of Shanghai Municipality [13JC14025000, 15520711000, 19DZ2270200, 20511107700]
- Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University [SKLASS 2021-Z10, SKLASS 2021-11]
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This study reports a novel heredity phenomenon where the mechanical properties of thermo-mechanically processed Cu-15Ni-8Sn alloys were improved by refining the as-cast structure. The underlying mechanism of hereditary strengthening was carefully analyzed, showing that it is mainly attributed to the additional dislocation proliferation induced by structure refinement and accelerated precipitation effect on strengthening phases. The strengthening mode changes from grain refinement in as-cast state to dislocation and precipitation strengthening in aged alloys.
In this investigation, a novel heredity phenomenon was reported that the mechanical properties of thermo-mechanically processed Cu-15Ni-8Sn alloys were improved by refining the as-cast structure. This underlying mechanism of hereditary strengthening was carefully analyzed, which is mainly contributed to the additional dislocation proliferation induced by structure refinement and accelerated precipitation effect on strengthening phases. The strengthening mode changed from grain refinement strengthening in as-cast state to dislocation strengthening and precipitation strengthening for aged alloys.
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