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Title: Anomalous temperature dependence of the yield stress by [l brace]11[bar 2]2[r brace]<[ovr 11]23> secondary pyramidal slip in cadmium crystals; 1: Experiments

Abstract

Yield stress [sigma][sub y] due to [l brace]11[bar 2]2[r brace]<[ovr 11]23> slip (SPCS) in cadmium crystals is proportional to temperature T (anomalous temperature dependence). An increment of strain rate causes [sigma][sub y] to increase. The deformation proceeds inhomogeneously with the nucleation and growth of bundles of slip steps (BSS) which correspond to etch pit bands (EPB). The strain [epsilon][sub B] BSS or EPB is constant independent of applied strain. The density of dislocations in EPB is nearly constant independent of strain, strain rate and T. [epsilon][sub B] and the mean free path of edge dislocations decrease exponentially with increasing T. The above results suggest that the deformation mode by SPCS is similar to Lueders deformation and the growth rate of BSS or EPB width increases with increasing T and strain rate. The anomalous temperature dependence is interpreted by the immobilization of edge dislocations and the growth rate related with double cross slip.

Authors:
; ;  [1];  [2]
  1. Kumamoto Univ. (Japan). Materials Science and Resource Engineering
  2. California Inst. of Tech., Pasadena, CA (United States)
Publication Date:
OSTI Identifier:
6987057
Resource Type:
Journal Article
Journal Name:
Acta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 42:8; Journal ID: ISSN 0956-7151
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CADMIUM; DISLOCATIONS; YIELD STRENGTH; DEFORMATION; SLIP; STRESSES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTS; LINE DEFECTS; MECHANICAL PROPERTIES; METALS; 360103* - Metals & Alloys- Mechanical Properties; 360102 - Metals & Alloys- Structure & Phase Studies

Citation Formats

Tonda, Hideki, Ando, Shinji, Takashima, Kazuki, and Vreeland, T Jr. Anomalous temperature dependence of the yield stress by [l brace]11[bar 2]2[r brace]<[ovr 11]23> secondary pyramidal slip in cadmium crystals; 1: Experiments. United States: N. p., 1994. Web. doi:10.1016/0956-7151(94)90225-9.
Tonda, Hideki, Ando, Shinji, Takashima, Kazuki, & Vreeland, T Jr. Anomalous temperature dependence of the yield stress by [l brace]11[bar 2]2[r brace]<[ovr 11]23> secondary pyramidal slip in cadmium crystals; 1: Experiments. United States. https://doi.org/10.1016/0956-7151(94)90225-9
Tonda, Hideki, Ando, Shinji, Takashima, Kazuki, and Vreeland, T Jr. 1994. "Anomalous temperature dependence of the yield stress by [l brace]11[bar 2]2[r brace]<[ovr 11]23> secondary pyramidal slip in cadmium crystals; 1: Experiments". United States. https://doi.org/10.1016/0956-7151(94)90225-9.
@article{osti_6987057,
title = {Anomalous temperature dependence of the yield stress by [l brace]11[bar 2]2[r brace]<[ovr 11]23> secondary pyramidal slip in cadmium crystals; 1: Experiments},
author = {Tonda, Hideki and Ando, Shinji and Takashima, Kazuki and Vreeland, T Jr},
abstractNote = {Yield stress [sigma][sub y] due to [l brace]11[bar 2]2[r brace]<[ovr 11]23> slip (SPCS) in cadmium crystals is proportional to temperature T (anomalous temperature dependence). An increment of strain rate causes [sigma][sub y] to increase. The deformation proceeds inhomogeneously with the nucleation and growth of bundles of slip steps (BSS) which correspond to etch pit bands (EPB). The strain [epsilon][sub B] BSS or EPB is constant independent of applied strain. The density of dislocations in EPB is nearly constant independent of strain, strain rate and T. [epsilon][sub B] and the mean free path of edge dislocations decrease exponentially with increasing T. The above results suggest that the deformation mode by SPCS is similar to Lueders deformation and the growth rate of BSS or EPB width increases with increasing T and strain rate. The anomalous temperature dependence is interpreted by the immobilization of edge dislocations and the growth rate related with double cross slip.},
doi = {10.1016/0956-7151(94)90225-9},
url = {https://www.osti.gov/biblio/6987057}, journal = {Acta Metallurgica et Materialia; (United States)},
issn = {0956-7151},
number = ,
volume = 42:8,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 1994},
month = {Mon Aug 01 00:00:00 EDT 1994}
}