New Structural Insight into Interface-Controlled alpha-sigma Phase Transformation in Fe-Cr Alloys

被引：3

作者：

Al Khoury, Wael ^{[1
]}

Tamura, Nobumichi ^{[2
]}

Geandier, Guillaume ^{[3
]}

Goudeau, Philippe ^{[4
]}

机构：

[1] Atom Energy Commiss Syria AECS, POB 6091, Damascus, Syria

[2] ALSLBNL, 1 Cyclotron Rd,MS 2-400, Berkeley, CA 94720 USA

[3] Univ Lorraine, Inst Jean Lamour, UMR 7198, CNRS, Campus Artem,2 Allee Andre Guinier,BP 50840, F-54011 Nancy, France

[4] Univ Poitiers, Inst Pprime, UPR 3346, CNRS,ENSMA,SP2MI, Blvd Marie & Pierre Curie,BP30179, F-86962 Futuroscope, France

来源：

QUANTUM BEAM SCIENCE | 2018年 / 2卷 / 04期

关键词：

synchrotron X-ray diffraction; iron alloys; phase transformations; grain orientation; grain/phase boundaries; strain/stress measurement;

D O I：

10.3390/qubs2040027

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Synchrotron Laue microdiffraction scanning is used for the ex situ study of the body-centered, cubic-to-tetragonal phase transformation that occurs in equiatomic polycrystalline Fe-Cr alloys at temperatures between 550 and 800 degrees C. Grain orientation and grain strains were scanned with a micron step resolution after annealing at 700 degrees C for 12 h. Further microstructural details on the early stage of the transformation, and more particularly on the cubic-to-tetragonal phase interface, were achieved. Only the alpha and ordered sigma phases were detected. The crystallographic relationships at the interface between the two phases did not follow the predicted rules; this result is discussed in relation to the measured microstrains.

引用

页数：8

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