Internal stress and defect-related free volume in submicrocrystalline Ni studied by neutron diffraction and difference dilatometry

被引：5

作者：

Kotzurek, J. A. ^{[1
]}

Hofmann, M. ^{[2
]}

Simic, S. ^{[3
]}

Poelt, P. ^{[4
]}

Hohenwarter, A. ^{[5
]}

Pippan, R. ^{[6
]}

Sprengel, W. ^{[1
]}

Wuerschum, R. ^{[1
]}

机构：

[1] Graz Univ Technol, Inst Mat Phys, Graz, Austria

[2] Tech Univ Munich, Res Neutron Source Heinz Maier Leibnitz FRM 2, Garching, Germany

[3] Graz Ctr Electron Microscopy, Graz, Austria

[4] Graz Univ Technol, Inst Electron Microscopy & Nanoanalyt, Graz, Austria

[5] Univ Leoben, Dept Mat Phys, Leoben, Austria

[6] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Leoben, Austria

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2017年 / 97卷 / 11期

基金：

奥地利科学基金会;

关键词：

Dilatometry; neutron diffraction; high-pressure torsion; internal strain; vacancy; SEVERE PLASTIC-DEFORMATION; HIGH-PRESSURE TORSION; METALS; STATES; TOOL;

D O I：

10.1080/09500839.2017.1408966

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combined study of neutron diffraction and difference dilatometry on submicrocrystalline Ni prepared by high pressure torsion aims at studying the anisotropic behaviour during dilatometry and its relation to internal stress and structural anisotropy. Macroscopic stresses were undetectable in the dilatometer samples. Along with specific tests such as post cold-rolling, this shows that an observed anisotropic length change upon annealing is not caused by internal stress, but can be explained by the inherent microstructure, i.e. the anisotropic annealing of relaxed vacancies at grain boundaries of shape-anisotropic crystallites.

引用

页码：450 / 458

页数：9

共 20 条

[1] In situ neutron diffraction measurement of residual stress relaxation in a welded steel pipe during heat treatment [J].