Load relaxation studies of AgCl

I. Lerner, D. L. Kohlstedt

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Room-temperature load relaxation experiments were performed on single crystals of nominally pure, UV-illuminated, γ-irradiated, and Cd2+-doped single crystals of AgCl. The resulting log σ-log ε{lunate} curves, all of which are concave downward, were analyzed in terms of Hart's two branch rheological model. The constant hardness log σ-log ε{lunate} curves obtained at several prestrain levels on nominally pure crystals can be translated into a single master curve demonstrating that the plastic deformation behavior of nominally pure AgCl at room temperature can be described by a mechanical equation of state. The log σ-log ε{lunate} curves for UV-illuminated and Cd2+-doped crystals deviate at low strain rates from those for nominally pure crystals suggesting that dislocation-precipitate and dislocation-point defect interactions are important at low strain rates in the UV-illuminated and Cd2+-doped samples. At a given stress level, the log σ-log ε{lunate} curves of the γ-irradiated crystals are more steeply curved than those of the nominally pure crystals and can be superimposed onto the curves for the nominally pure crystal by translation to higher stress and strain rate levels. These observations indicate that the high-temperature branch in Hart's model contributes more to the flow stress in the γ-irradiated samples than it does in the nominally pure crystals. In addition, the deformation behavior of crystals deformed along the [100] and [111] axes were studied in order to compare flow on the {110}〈110〉 and {001}〈11̄0〉 slip systems. The log σ-log ε{lunate} curves for the [100] crystal are more steeply concave downward than those for the [111] crystals, indicating that the high-temperature mechanism in Hart's model is more important for flow on {110}〈110〉 than on {001}〈110〉.

Original languageEnglish (US)
Pages (from-to)225-233
Number of pages9
JournalActa Metallurgica
Volume30
Issue number1
DOIs
StatePublished - Jan 1 1982

Fingerprint

Crystals
Strain rate
Dislocations (crystals)
Single crystals
Temperature
Point defects
Plastic flow
Equations of state
Precipitates
Plastic deformation
Hardness
Experiments

Cite this

Load relaxation studies of AgCl. / Lerner, I.; Kohlstedt, D. L.

In: Acta Metallurgica, Vol. 30, No. 1, 01.01.1982, p. 225-233.

Research output: Contribution to journalArticle

Lerner, I & Kohlstedt, DL 1982, 'Load relaxation studies of AgCl', Acta Metallurgica, vol. 30, no. 1, pp. 225-233. https://doi.org/10.1016/0001-6160(82)90060-8
Lerner, I. ; Kohlstedt, D. L. / Load relaxation studies of AgCl. In: Acta Metallurgica. 1982 ; Vol. 30, No. 1. pp. 225-233.
@article{4fd5d5fdc4174701939efae4c0be9b0c,
title = "Load relaxation studies of AgCl",
abstract = "Room-temperature load relaxation experiments were performed on single crystals of nominally pure, UV-illuminated, γ-irradiated, and Cd2+-doped single crystals of AgCl. The resulting log σ-log ε{lunate} curves, all of which are concave downward, were analyzed in terms of Hart's two branch rheological model. The constant hardness log σ-log ε{lunate} curves obtained at several prestrain levels on nominally pure crystals can be translated into a single master curve demonstrating that the plastic deformation behavior of nominally pure AgCl at room temperature can be described by a mechanical equation of state. The log σ-log ε{lunate} curves for UV-illuminated and Cd2+-doped crystals deviate at low strain rates from those for nominally pure crystals suggesting that dislocation-precipitate and dislocation-point defect interactions are important at low strain rates in the UV-illuminated and Cd2+-doped samples. At a given stress level, the log σ-log ε{lunate} curves of the γ-irradiated crystals are more steeply curved than those of the nominally pure crystals and can be superimposed onto the curves for the nominally pure crystal by translation to higher stress and strain rate levels. These observations indicate that the high-temperature branch in Hart's model contributes more to the flow stress in the γ-irradiated samples than it does in the nominally pure crystals. In addition, the deformation behavior of crystals deformed along the [100] and [111] axes were studied in order to compare flow on the {110}〈110〉 and {001}〈11̄0〉 slip systems. The log σ-log ε{lunate} curves for the [100] crystal are more steeply concave downward than those for the [111] crystals, indicating that the high-temperature mechanism in Hart's model is more important for flow on {110}〈110〉 than on {001}〈110〉.",
author = "I. Lerner and Kohlstedt, {D. L.}",
year = "1982",
month = "1",
day = "1",
doi = "10.1016/0001-6160(82)90060-8",
language = "English (US)",
volume = "30",
pages = "225--233",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Load relaxation studies of AgCl

AU - Lerner, I.

AU - Kohlstedt, D. L.

PY - 1982/1/1

Y1 - 1982/1/1

N2 - Room-temperature load relaxation experiments were performed on single crystals of nominally pure, UV-illuminated, γ-irradiated, and Cd2+-doped single crystals of AgCl. The resulting log σ-log ε{lunate} curves, all of which are concave downward, were analyzed in terms of Hart's two branch rheological model. The constant hardness log σ-log ε{lunate} curves obtained at several prestrain levels on nominally pure crystals can be translated into a single master curve demonstrating that the plastic deformation behavior of nominally pure AgCl at room temperature can be described by a mechanical equation of state. The log σ-log ε{lunate} curves for UV-illuminated and Cd2+-doped crystals deviate at low strain rates from those for nominally pure crystals suggesting that dislocation-precipitate and dislocation-point defect interactions are important at low strain rates in the UV-illuminated and Cd2+-doped samples. At a given stress level, the log σ-log ε{lunate} curves of the γ-irradiated crystals are more steeply curved than those of the nominally pure crystals and can be superimposed onto the curves for the nominally pure crystal by translation to higher stress and strain rate levels. These observations indicate that the high-temperature branch in Hart's model contributes more to the flow stress in the γ-irradiated samples than it does in the nominally pure crystals. In addition, the deformation behavior of crystals deformed along the [100] and [111] axes were studied in order to compare flow on the {110}〈110〉 and {001}〈11̄0〉 slip systems. The log σ-log ε{lunate} curves for the [100] crystal are more steeply concave downward than those for the [111] crystals, indicating that the high-temperature mechanism in Hart's model is more important for flow on {110}〈110〉 than on {001}〈110〉.

AB - Room-temperature load relaxation experiments were performed on single crystals of nominally pure, UV-illuminated, γ-irradiated, and Cd2+-doped single crystals of AgCl. The resulting log σ-log ε{lunate} curves, all of which are concave downward, were analyzed in terms of Hart's two branch rheological model. The constant hardness log σ-log ε{lunate} curves obtained at several prestrain levels on nominally pure crystals can be translated into a single master curve demonstrating that the plastic deformation behavior of nominally pure AgCl at room temperature can be described by a mechanical equation of state. The log σ-log ε{lunate} curves for UV-illuminated and Cd2+-doped crystals deviate at low strain rates from those for nominally pure crystals suggesting that dislocation-precipitate and dislocation-point defect interactions are important at low strain rates in the UV-illuminated and Cd2+-doped samples. At a given stress level, the log σ-log ε{lunate} curves of the γ-irradiated crystals are more steeply curved than those of the nominally pure crystals and can be superimposed onto the curves for the nominally pure crystal by translation to higher stress and strain rate levels. These observations indicate that the high-temperature branch in Hart's model contributes more to the flow stress in the γ-irradiated samples than it does in the nominally pure crystals. In addition, the deformation behavior of crystals deformed along the [100] and [111] axes were studied in order to compare flow on the {110}〈110〉 and {001}〈11̄0〉 slip systems. The log σ-log ε{lunate} curves for the [100] crystal are more steeply concave downward than those for the [111] crystals, indicating that the high-temperature mechanism in Hart's model is more important for flow on {110}〈110〉 than on {001}〈110〉.

UR - http://www.scopus.com/inward/record.url?scp=0019927258&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0019927258&partnerID=8YFLogxK

U2 - 10.1016/0001-6160(82)90060-8

DO - 10.1016/0001-6160(82)90060-8

M3 - Article

AN - SCOPUS:0019927258

VL - 30

SP - 225

EP - 233

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 1

ER -