Mechanism of the α-ε phase transformation in iron

被引：61

作者：

Dewaele, A. ^{[1
]}

Denoual, C. ^{[1
]}

Anzellini, S. ^{[1
]}

Occelli, F. ^{[1
]}

Mezouar, M. ^{[2
]}

Cordier, P. ^{[3
]}

Merkel, S. ^{[3
]}

Veron, M. ^{[4
]}

Rausch, E. ^{[4
]}

机构：

[1] Commissariat Energie Atom, Direct Applicat Militaires, F-91297 Arpajon, France

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] Univ Lille 1, UMR CNRS 8207, Unite Materiaux & Transformat, F-59655 Villeneuve Dascq, France

[4] Grenoble INP CNRS UJF, Lab SIMaP, F-38402 St Martin Dheres, France

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 17期

关键词：

HIGH-PRESSURE; MARTENSITIC-TRANSFORMATION; TRANSITION; ORIENTATION; CALIBRATION; HELIUM; GAUGE; GPA;

D O I：

10.1103/PhysRevB.91.174105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The alpha-Fe <-> is an element of-Fe pressure-induced transformation under pure hydrostatic static compression has been characterized with in situ x-ray diffraction using alpha-Fe single crystals as starting samples. The forward transition starts at 14.9 GPa, and the reverse at 12 GPa, with a width of alpha-is an element of coexistence domain of the order of 2 GPa. The elastic stress in the sample increases in this domain, and partially relaxes after completion of the transformation. Orientation relations between parent alpha-Fe and child is an element of-Fe have been determined, which definitely validates the Burgers path for the direct transition. On the reverse transition, an unexpected variant selection is observed. X-ray diffraction data, complemented with ex situ microstructural observations, suggest that this selection is caused by defects and stresses accumulated during the direct transition.

引用

页数：8

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