Atomic Force Microscope Investigation of the Surface Relief Effect of Bainite in An Fe--C--Mn--Ni--Si Alloy

Acta Metall Sin

2004, Vol. 40

Issue (6): 574- DOI:

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Atomic Force Microscope Investigation of the Surface Relief Effect of Bainite in An Fe--C--Mn--Ni--Si Alloy

YANG Jinbo; YANG Zhigang; BAI Bingzhe; FANG Hongsheng

Department of Materials Science and Engineering; Tsinghua University; Beijing 100084

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YANG Jinbo; YANG Zhigang; BAI Bingzhe; FANG Hongsheng. Atomic Force Microscope Investigation of the Surface Relief Effect of Bainite in An Fe--C--Mn--Ni--Si Alloy. Acta Metall Sin, 2004, 40(6): 574-.

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Abstract Surface relief effect and their corresponding microstructure accompanying bainitic transformation in the steel Fe--0.33C--3.0Mn--2.15Si--1.25Ni (mass fraction, %) were studied by atomic force microscope (AFM). The results show that surface relief of bainite is produced by bainitic ferrite solely without the involvement of austenite. Furthermore, surface relief of a single structural unit is tent--shaped rather than invariant--plane--strain--typed and the tilt angles of the two sides are 9--10 and 8--9, respectively close to the magnitude expected from the diffusional ledgewise growth mechanism.

Key words: bainite surface relief ferrite structural unit

Received: 01 July 2003

ZTFLH:

TG115.22

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2004/V40/I6/574

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