Natural-ageing-enhanced precipitation near grain boundaries in high-strength aluminum alloy
Natural-ageing-enhanced precipitation near grain boundaries in high-strength aluminum alloy
复制标题
高强度铝合金晶界附近自然时效强化析出
DOI:
10.1016/j.jmst.2019.11.035
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发表时间:
2020-06
影响因子:
10.9
通讯作者:
Jianjun Li
中科院分区:
文献类型:
--
作者:
Peipei Ma;Chunhui Liu;Qiuyu Chen;Qing Wang;Lihua Zhan;Jianjun Li
Artificial ageing above 165 °C directly after quenching induces the formation of ∼50 nm wide precipitate-free zone (PFZ) and ∼100 nm wide precipitate-sparse zone (PSZ) consisting of coarse precipitates with a gradient in size and density toward the grain center in a commercial Al-Zn-Mg-Cu alloy. With the grain size decreasing, the fraction of PFZ and PSZ in a grain becomes larger and could even occupy the entire volume of the grain. This undesirable microstructure near the grain boundary is mitigated substantially by natural pre-ageing, leading to an exceptional enhancement of the age hardening potential at elevated temperatures. Natural ageing could fundamentally alter the precipitation near grain boundary, and is a promising method to optimize the precipitation hardening in high strength aluminum alloys with unconventionally small grains.
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DOI:
10.1007/s11661-018-4601-8
发表时间:
2018-04
期刊:
Metallurgical and Materials Transactions A
影响因子:
--
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通讯作者:
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影响因子:
6.2
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通讯作者:
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影响因子:
8.3
作者:
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通讯作者:
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DOI:
10.1016/j.msea.2007.01.001
发表时间:
2007-07-15
影响因子:
6.4
作者:
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通讯作者:
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影响因子:
9.4
作者:
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通讯作者:
B. Cai;B. Adams;T. Nelson