Atom probe tomography characterization of heavily cold drawn pearlitic steel wire

被引：73

作者：

Li, Y. J. ^{[1
,2
]}

Choi, P. ^{[1
]}

Borchers, C. ^{[2
]}

Chen, Y. Z. ^{[2
]}

Goto, S. ^{[3
]}

Raabe, D. ^{[1
]}

Kirchheim, R. ^{[1
,2
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] Univ Gottingen, Inst Mat Phys, D-37077 Gottingen, Germany

[3] Akita Univ, Dept Mat Sci & Engn, Fac Engn & Resource Sci, Akita 0100852, Japan

来源：

ULTRAMICROSCOPY | 2011年 / 111卷 / 06期

关键词：

Atom probe tomography; Pearlitic steel wire; Cementite decomposition; Severe plastic deformation; Dislocations; Cell boundaries; SEVERE PLASTIC-DEFORMATION; TRANSMISSION ELECTRON-MICROSCOPY; CEMENTITE DISSOLUTION; SPECIMEN PREPARATION; FE-C; MICROSTRUCTURE; FIB;

D O I：

10.1016/j.ultramic.2010.11.010

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Atom Probe Tomography (APT) was used to analyze the carbon distribution in a heavily cold drawn pearlitic steel wire with a true strain of 6.02. The carbon concentrations in cementite and ferrite were separately measured by a sub-volume method and compared with the literature data. It is found that the carbon concentration in ferrite saturates with strain. The carbon concentration in cementite decreases with the lamellar thickness, while the carbon atoms segregate at dislocations or cell/grain boundaries in ferrite. The mechanism of cementite decomposition is discussed in terms of the evolution of dislocation structure during severe plastic deformation. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：628 / 632

页数：5

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