Reconstructing the austenite parent microstructure of martensitic steels: A case study for reduced-activation Eurofer steels

被引：10

作者：

Almeida Junior, D. R. ^{[1
]}

Zilnyk, K. D. ^{[2
]}

Raabe, D. ^{[3
]}

Sandim, H. R. Z. ^{[1
]}

机构：

[1] Univ Sao Paulo, EEL, Lorena Sch Engn, BR-12602810 Lorena, SP, Brazil

[2] ITA, BR-12228900 Sao Jose Dos Campos, SP, Brazil

[3] MPI E, D-40237 Dusseldorf, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2019年 / 516卷

基金：

巴西圣保罗研究基金会;

关键词：

Reduced-activation ferritic-martensitic steels; Martensitic transformation; EBSD; Reconstruction; Orientation relationship; ARPGE; PRE-TRANSFORMATION MICROSTRUCTURES; ORIENTATION RELATIONSHIP; GRAIN-GROWTH; ODS-EUROFER; AUTOMATED RECONSTRUCTION; EBSD; PHASE; CHALLENGES; MECHANISM; TEXTURE;

D O I：

10.1016/j.jnucmat.2019.01.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A computer program was employed to reconstruct the parent microstructure from electron backscatter diffraction maps taken from martensite. The reconstruction is based on a given user-selected orientation relationship. Two reduced-activation ferritic-martensitic Eurofer steels were austenitized for several times and cooled down at different rates. Two parameters are proposed to assess the quality of the reconstruction: the relative frequency of orientations in a determined sub-portion of the Euler space and the distribution of the angular deviation from a given theoretical orientation relationship. The number of active martensitic orientation variants during the transformation depends on grain size. Coarser grains enable a greater number of active variants improving the reconstruction quality. The distributions of angular deviations reveal that the Greninger-Troiano orientation relationship is the one that best describes the martensitic transformation in both steel grades. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：185 / 193

页数：9

共 50 条

[1] EBSD and reconstruction of pre-transformation microstructures, examples and complexities in steels [J].

Abbasi, Majid ;

Kim, Dong-Ik ;

Nelson, Tracy W. ;

Abbasi, Mehrdad .

MATERIALS CHARACTERIZATION, 2014, 95 :219-231

[2] Application of Newton's method for precise calculation of parent orientation and orientation relationship from orientations of daughter phase [J].

Anh Hoang Pham ;

Ohba, Takuya ;

Morito, Shigekazu ;

Hayashi, Taisuke .

MATERIALS CHARACTERIZATION, 2017, 132 :108-118

[3] Orientation relationship in various 9%Cr ferritic/martensitic steels-EBSD comparison between Nishiyama-Wassermann, Kurdjumov-Sachs and Greninger-Troiano [J].

Barcelo, F. ;

Bechade, J. -L. ;

Fournier, B. .

PHASE TRANSITIONS, 2010, 83 (08) :601-614

[4]

Bunge HJ., 2015, TEXTURE ANAL MAT SCI

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

Cayron, C. ;

Artaud, B. ;

Briottet, L. .

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

[6] Groupoid of orientational variants [J].

Cayron, C .

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

[7] ARPGE:: a computer program to automatically reconstruct the parent grains from electron backscatter diffraction data [J].

Cayron, Cyril .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2007, 40 :1183-1188

[8] Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature [J].

Danon, A ;

Servant, C ;

Alamo, A ;

Brachet, JC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 348 (1-2) :122-132

[9] Recent advances in the application of orientation imaging [J].

Field, DP .

ULTRAMICROSCOPY, 1997, 67 (1-4) :1-9

[10] Reliability of reconstructed β-orientation maps in titanium alloys [J].

Germain, L. ;

Gey, N. ;

Humbert, M. .

ULTRAMICROSCOPY, 2007, 107 (12) :1129-1135

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