The mechanisms of the fcc-bcc martensitic transformation revealed by pole figures

被引：76

作者：

Cayron, Cyril ^{[1
]}

Barcelo, Francoise ^{[2
]}

de Carlan, Yann ^{[2
]}

机构：

[1] Minatec, DRT, LITEN, CEA, F-38054 Grenoble 9, France

[2] CEA, DEN, SRMA, F-91191 Gif Sur Yvette, France

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 04期

关键词：

EBSD; Martensitic phase transformation; Pole figure; ORIENTATION RELATIONSHIPS; VARIANT SELECTION; COMPUTER-PROGRAM; PARENT GRAINS; DIFFRACTION; BAINITE; STEELS; EBSD;

D O I：

10.1016/j.actamat.2009.10.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Face-centered cubic (fcc) to body-centered cubic (bcc) martensitic transformations occur in many materials, such as steels, FeNi meteorites or brass. The phenomenological theory has been the accepted theory for these transformations for more than half a century. However, it cannot explain the continuous singular features in the experimental electron backscatter diffraction or X-ray diffraction pole figures. Here we show that such patterns can be simulated by one discrete orientation relationship and two continuous rotations that correspond to a trace of the transformation mechanisms. A new theory of martensite transformation that is in full agreement with the experimental pole figures is proposed. In this theory, the fcc-bcc transformation results from a fcc-hexagonal close-packed (hcp) step followed by an hcp-bcc step. The advantages of this two-step theory over the phenomenological theory are discussed. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1395 / 1402

页数：8

共 44 条

[1]

Bain EC, 1924, T AM I MIN MET ENG, V70, P25

[2]

BERES M, COMMUNICATION

[3]

Bhadeshia HK., 1987, Worked examples in the geometry of crystals

[4] THE CRYSTALLOGRAPHY OF MARTENSITE TRANSFORMATIONS .3. FACE-CENTRED CUBIC TO BODY-CENTRED TETRAGONAL TRANSFORMATIONS [J].

BOWLES, JS ;

MACKENZIE, JK .

ACTA METALLURGICA, 1954, 2 (02) :224-234

[5]

BOWLES JS, 1954, ACTA METALL MATER, V2, P129, DOI 10.1016/0001-6160(54)90102-9

[6] Orientation relationship of Widmannstatten plates in an iron meteorite measured with high-energy synchrotron radiation [J].

Bunge, HJ ;

Weiss, W ;

Klein, H ;

Wcislak, L ;

Garbe, U ;

Schneider, JR .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2003, 36 :137-140

[7] On the process of transition of the cubic-body-centered modification into the hexagonal-close-packed modification of zirconium [J].

Burgers, WG .

PHYSICA, 1934, 1 :561-586

[8] Reconstruction of parent grains from EBSD data [J].

Cayron, C. ;

Artaud, B. ;

Briottet, L. .

MATERIALS CHARACTERIZATION, 2006, 57 (4-5) :386-401

[9] Groupoid of orientational variants [J].

Cayron, C .

ACTA CRYSTALLOGRAPHICA SECTION A, 2006, 62 :21-40

[10] GenOVa:: a computer program to generate orientational variants [J].

Cayron, Cyril .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2007, 40 :1179-1182

← 1 2 3 4 5 →