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TiZrHfMoCrCo合金中热处理和高压扭转引起的相变

Phase Transformations Caused by Heat Treatment and High-Pressure Torsion in TiZrHfMoCrCo Alloy.

作者信息

Gornakova Alena S, Straumal Boris B, Tyurin Alexander I, Afonikova Natalia S, Druzhinin Alexander V, Davdian Gregory S, Kilmametov Askar R

机构信息

Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Ac. Osipyan Str. 2, 142432 Chernogolovka, Russia.

G.R. Derzhavin Research Institute "Nanotechnologies and Nanomaterials" TSU, Internazionalnaja Str. 30, 392000 Tambov, Russia.

出版信息

Materials (Basel). 2023 Feb 5;16(4):1354. doi: 10.3390/ma16041354.

DOI:10.3390/ma16041354
PMID:36836984
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9958938/
Abstract

In this work the high-entropy alloy studied contained six components, Ti/Zr/Hf/Mo/Cr/Co, and three phases, namely one phase with body-centered cubic lattice (BCC) and two Laves phases C14 and C15. A series of annealings in the temperature range from 600 to 1000 °C demonstrated not only a change in the microstructure of the TiZrHfMoCrCo alloy, but also the modification of phase composition. After annealing at 1000 °C the BCC phase almost fully disappeared. The annealing at 600 and 800 °C leads to the formation of new Laves phases. After high-pressure torsion (HPT) of the as-cast TiZrHfMoCrCo alloy, the grains become very small, the BCC phase prevails, and C14 Laves phase completely disappears. This state is similar to the state after annealing at high effective temperature . The additional annealing at 1000 °C after HPT returns the phase composition back to the state similar to that of the as-cast alloy after annealing at 1000 °C. At 1000 °C the BCC phase completely wets the C15/C15 grain boundaries (GBs). At 600 and 800 °C the GB wetting is incomplete. The big spread of nanohardness and Young's modulus for the BCC phase and (C15 + C14) Laves phases is observed.

摘要

在本研究中，所研究的高熵合金包含六种成分，即Ti/Zr/Hf/Mo/Cr/Co，以及三个相，即一个体心立方晶格（BCC）相和两个Laves相C14和C15。在600至1000°C温度范围内进行的一系列退火不仅表明了TiZrHfMoCrCo合金微观结构的变化，还表明了相组成的改变。在1000°C退火后，BCC相几乎完全消失。在600和800°C退火导致形成新的Laves相。铸态TiZrHfMoCrCo合金经过高压扭转（HPT）后，晶粒变得非常小，BCC相占主导，C14 Laves相完全消失。这种状态类似于在高有效温度下退火后的状态。HPT后在1000°C进行的额外退火使相组成恢复到类似于铸态合金在1000°C退火后的状态。在1000°C时，BCC相完全浸润C15/C15晶界（GBs）。在600和800°C时，晶界浸润不完全。观察到BCC相和（C15 + C14）Laves相的纳米硬度和杨氏模量有很大差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/95820f1e0d47/materials-16-01354-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/efd619e1043d/materials-16-01354-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/baea956a0b65/materials-16-01354-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/6db779d9838d/materials-16-01354-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/086a3b9f01bb/materials-16-01354-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/71ba58ddaf3c/materials-16-01354-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/cb521394f107/materials-16-01354-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/d05719286091/materials-16-01354-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/95820f1e0d47/materials-16-01354-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/f854e5f9a016/materials-16-01354-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/22bc4cea1803/materials-16-01354-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/bc32f6d2246d/materials-16-01354-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/b0935102c47f/materials-16-01354-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/efd619e1043d/materials-16-01354-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/baea956a0b65/materials-16-01354-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/6db779d9838d/materials-16-01354-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/086a3b9f01bb/materials-16-01354-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/71ba58ddaf3c/materials-16-01354-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/cb521394f107/materials-16-01354-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/d05719286091/materials-16-01354-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f07/9958938/95820f1e0d47/materials-16-01354-g012.jpg

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