3D Residual Strain in DKDP Crystals by Neutron Diffraction

Fafu Liu; Xun Sun; Guangai Sun; Jianwu Cao; Xiaoming Mu; Zaizai Guo; Qingxi Yuan

doi:10.1002/crat.201900022

3D Residual Strain in DKDP Crystals by Neutron Diffraction

Fafu Liu^*, Xun Sun, Guangai Sun, Jianwu Cao, Xiaoming Mu, Zaizai Guo, Qingxi Yuan

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Neutron diffraction technique is applied to study the three-dimensional (3D) residual strains in K(H₁₋ _xD_x)₂PO₄ (DKDP) crystals with various deuterium contents (0 ≤ x ≤ 0.99). It is found that the residual strains in the crystalline coordinate are at the magnitude of 10⁻³ to 10⁻⁴. The results show that the level of the macro-strain in the crystal bulk is independent of the deuteration level. However, when the deuteration level is below 50%, the average of micro-strain increases first with the increasing of deuteration level, then decreases when the deuteration level is in excess of 50%. According to the residual strains, the internal stresses are calculated through σ_ij = C_ijklε_kl. Finally, the potential sources of the stresses in crystals are discussed and analyzed.

Original language	English
Article number	1900022
Journal	Crystal Research and Technology
Volume	54
Issue number	9
DOIs	https://doi.org/10.1002/crat.201900022
Publication status	Published - 1 Sept 2019

Keywords

DKDP crystal
KHPO
deuterium-doped KDP
neutron diffraction
residual strain

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10.1002/crat.201900022

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title = "3D Residual Strain in DKDP Crystals by Neutron Diffraction",

abstract = "Neutron diffraction technique is applied to study the three-dimensional (3D) residual strains in K(H1− xDx)2PO4 (DKDP) crystals with various deuterium contents (0 ≤ x ≤ 0.99). It is found that the residual strains in the crystalline coordinate are at the magnitude of 10−3 to 10−4. The results show that the level of the macro-strain in the crystal bulk is independent of the deuteration level. However, when the deuteration level is below 50\%, the average of micro-strain increases first with the increasing of deuteration level, then decreases when the deuteration level is in excess of 50\%. According to the residual strains, the internal stresses are calculated through σij = Cijklεkl. Finally, the potential sources of the stresses in crystals are discussed and analyzed.",

keywords = "DKDP crystal, KHPO, deuterium-doped KDP, neutron diffraction, residual strain",

author = "Fafu Liu and Xun Sun and Guangai Sun and Jianwu Cao and Xiaoming Mu and Zaizai Guo and Qingxi Yuan",

note = "Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

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doi = "10.1002/crat.201900022",

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journal = "Crystal Research and Technology",

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TY - JOUR

T1 - 3D Residual Strain in DKDP Crystals by Neutron Diffraction

AU - Liu, Fafu

AU - Sun, Xun

AU - Sun, Guangai

AU - Cao, Jianwu

AU - Mu, Xiaoming

AU - Guo, Zaizai

AU - Yuan, Qingxi

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Neutron diffraction technique is applied to study the three-dimensional (3D) residual strains in K(H1− xDx)2PO4 (DKDP) crystals with various deuterium contents (0 ≤ x ≤ 0.99). It is found that the residual strains in the crystalline coordinate are at the magnitude of 10−3 to 10−4. The results show that the level of the macro-strain in the crystal bulk is independent of the deuteration level. However, when the deuteration level is below 50%, the average of micro-strain increases first with the increasing of deuteration level, then decreases when the deuteration level is in excess of 50%. According to the residual strains, the internal stresses are calculated through σij = Cijklεkl. Finally, the potential sources of the stresses in crystals are discussed and analyzed.

AB - Neutron diffraction technique is applied to study the three-dimensional (3D) residual strains in K(H1− xDx)2PO4 (DKDP) crystals with various deuterium contents (0 ≤ x ≤ 0.99). It is found that the residual strains in the crystalline coordinate are at the magnitude of 10−3 to 10−4. The results show that the level of the macro-strain in the crystal bulk is independent of the deuteration level. However, when the deuteration level is below 50%, the average of micro-strain increases first with the increasing of deuteration level, then decreases when the deuteration level is in excess of 50%. According to the residual strains, the internal stresses are calculated through σij = Cijklεkl. Finally, the potential sources of the stresses in crystals are discussed and analyzed.

KW - DKDP crystal

KW - KHPO

KW - deuterium-doped KDP

KW - neutron diffraction

KW - residual strain

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U2 - 10.1002/crat.201900022

DO - 10.1002/crat.201900022

M3 - Article

AN - SCOPUS:85070668740

SN - 0232-1300

VL - 54

JO - Crystal Research and Technology

JF - Crystal Research and Technology

IS - 9

M1 - 1900022

ER -

3D Residual Strain in DKDP Crystals by Neutron Diffraction

Abstract

Keywords

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