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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of cold rolling ratio on the microstructure and recovery properties of Ti-Ni-Nb-Co shape memory alloys
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Effect of cold rolling ratio on the microstructure and recovery properties of Ti-Ni-Nb-Co shape memory alloys

机译：冷轧比对Ti-Ni-Nb-Co形记忆合金微观结构和回收性能的影响

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The Ti44.5Ni44.5Nb9Co2 alloys with different cold rolling ratios were annealed at 650 degrees C to investigate the influence of cold rolling ratio on the microstructure and recovery properties. The change in cold rolling ratio remarkably affected the distribution of beta-Nb phase and the density of dislocations and precipitates. The density of dislocations increased with the increase of cold rolling ratio, which facilitated preferential nucleation and growth of Ti2Co precipitates. Meanwhile, high density of dislocations and precipitates retarded the recovery and recrystallization process. Owing to the strengthening effect of dislocations and nanoscale precipitates, the 40% cold rolled Ti44.5Ni44.5Nb9Co2 alloy annealed at 650 degrees C after 16% pre-strain exhibited 25% enhancement in the total recovery strain and over 50% improvement for the recovery stress compared to the typical Ti-Ni-Nb alloys. (C) 2018 Elsevier B.V. All rights reserved.
机译：用不同冷轧比的Ti44.5Ni44.5NB9CO2合金在650℃下退火，以研究冷轧比对微观结构和回收性能的影响。 冷轧比的变化显着影响了β-Nb相的分布和脱位密度和沉淀物。 脱位密度随着冷轧比的增加而增加，促进了优先成核和Ti2CO沉淀的生长。 同时，高密度的脱位和沉淀物延迟了回收和再结晶过程。 由于脱位和纳米级沉淀物的强化效果，在16％的菌株预造成的16％℃下，在650℃下退火的40％冷轧Ti44.5Ni44.5NB9CO2合金在总回收菌株中表现出25％的增强，恢复超过50％ 应力与典型的Ti-Ni-Nb合金相比。 （c）2018年elestvier b.v.保留所有权利。

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