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纳米结构贝氏体中残余奥氏体的磁性和热稳定性的低温研究

Cryogenic study of the magnetic and thermal stability of retained austenite in nanostructured bainite.

作者信息

Argüelles Arántzazu, Barbés Florentina, Espeso Jose I, Garcia-Mateo Carlos

机构信息

Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica, Edificio Departamental Este-Campus de Viesques-Universidad de Oviedo, Gijón, Spain.

Dpto. CITIMAC, Universidad de Cantabria, Santander, Spain.

出版信息

Sci Technol Adv Mater. 2019 Jun 27;20(1):673-687. doi: 10.1080/14686996.2019.1625722. eCollection 2019.

DOI:10.1080/14686996.2019.1625722
PMID:31275459
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6598528/
Abstract

First magnetic characterization of a recently developed generation of carbide free bainitic steels, known as Nanobain, has been performed. Stability of its retained austenite at cryogenic temperatures has been studied by means of X-ray diffraction, microscopy, dilatometry and magnetic measurements. Two morphologies for this phase (-type and -type) appear in a different proportion depending on the chemical composition and the applied thermal treatment. Inhibition of the martensitic transformation, when decreasing the temperature down to -271°C, has been observed in those microstructures with higher proportion of austenite. The paramagnetic state of austenite at room temperature seems to lead to different magnetic behaviors (ferromagnetic, antiferromagnetic) at cryogenic temperatures (T or T being around -23°C in all the studied samples), depending on the proportion of such morphological features. Furthermore, irreversibility with temperature on the evolution of such magnetic behaviors has been observed for all the studied bainitic structures and is proposed to be due to a magnetic proximity effect.

摘要

首次对最近开发的新一代无碳化物贝氏体钢（称为纳米贝氏体）进行了磁性表征。通过X射线衍射、显微镜、膨胀测量法和磁性测量研究了其残余奥氏体在低温下的稳定性。根据化学成分和所采用的热处理，该相的两种形态（-型和-型）以不同比例出现。在奥氏体比例较高的那些微观结构中，当温度降至-271°C时，观察到马氏体转变受到抑制。室温下奥氏体的顺磁状态似乎会导致在低温（所有研究样品中的T或T约为-23°C）下出现不同的磁性行为（铁磁、反铁磁），这取决于此类形态特征的比例。此外，对于所有研究的贝氏体组织，均观察到这种磁性行为随温度的不可逆变化，并认为这是由于磁近邻效应所致。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/5cc2ff095dc5/TSTA_A_1625722_F0009_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c6994fed34e1/TSTA_A_1625722_UF0001_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/0d8fe3d9753d/TSTA_A_1625722_F0001_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/fc861f706226/TSTA_A_1625722_F0002_B.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/9d073dfd176f/TSTA_A_1625722_F0004_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/11e1c3ad9cdf/TSTA_A_1625722_F0005_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/3de62cecf211/TSTA_A_1625722_F0006_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/9de2e430b2e8/TSTA_A_1625722_F0007_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/e11bd82dc6ae/TSTA_A_1625722_F0008_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/aba712ec3e97/TSTA_A_1625722_F0010_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c43e2bbcae2f/TSTA_A_1625722_F0011_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c479a0a584f3/TSTA_A_1625722_F0012_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/4e71401a7475/TSTA_A_1625722_F0013_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/5cc2ff095dc5/TSTA_A_1625722_F0009_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c6994fed34e1/TSTA_A_1625722_UF0001_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/0d8fe3d9753d/TSTA_A_1625722_F0001_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/fc861f706226/TSTA_A_1625722_F0002_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/af6b5c484dd2/TSTA_A_1625722_F0003_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/9d073dfd176f/TSTA_A_1625722_F0004_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/11e1c3ad9cdf/TSTA_A_1625722_F0005_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/3de62cecf211/TSTA_A_1625722_F0006_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/9de2e430b2e8/TSTA_A_1625722_F0007_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/e11bd82dc6ae/TSTA_A_1625722_F0008_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/aba712ec3e97/TSTA_A_1625722_F0010_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c43e2bbcae2f/TSTA_A_1625722_F0011_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/c479a0a584f3/TSTA_A_1625722_F0012_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/4e71401a7475/TSTA_A_1625722_F0013_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f38e/6598528/5cc2ff095dc5/TSTA_A_1625722_F0009_OC.jpg

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