Abstract
A new method is proposed to determine whether the effective stress for the viscous or quasi-viscous motion of dislocations exists or not in the deformation of crystalline materials. The crosshead speed is changed on the way of deformation and the work-hardening rate is measured immediately after the change. It is theoretically predicted that the work-hardening rate depends on whether the effective stress is negligible or not. Applying the method to high-temperature deformation of pure aluminum and Al-5.4 at.% Mg alloy, it is found that the effective stress is negligible in pure aluminum at all temperatures tested and in the alloy at temperatures where the dynamic strain aging occurs, while the stress is appreciable in the alloy at temperatures where the solute atmosphere dragging occurs.
| Original language | English |
|---|---|
| Pages (from-to) | 1815-1824 |
| Number of pages | 10 |
| Journal | Acta Metallurgica |
| Volume | 29 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Jan 1 1981 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
Determination of high-temperature deformation mechanism in crystalline materials by the strain-rate change test. / Yoshinaga, Hideo; Horita, Zenji; Kurishita, Hiroaki.
In: Acta Metallurgica, Vol. 29, No. 11, 01.01.1981, p. 1815-1824.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Determination of high-temperature deformation mechanism in crystalline materials by the strain-rate change test
AU - Yoshinaga, Hideo
AU - Horita, Zenji
AU - Kurishita, Hiroaki
PY - 1981/1/1
Y1 - 1981/1/1
N2 - A new method is proposed to determine whether the effective stress for the viscous or quasi-viscous motion of dislocations exists or not in the deformation of crystalline materials. The crosshead speed is changed on the way of deformation and the work-hardening rate is measured immediately after the change. It is theoretically predicted that the work-hardening rate depends on whether the effective stress is negligible or not. Applying the method to high-temperature deformation of pure aluminum and Al-5.4 at.% Mg alloy, it is found that the effective stress is negligible in pure aluminum at all temperatures tested and in the alloy at temperatures where the dynamic strain aging occurs, while the stress is appreciable in the alloy at temperatures where the solute atmosphere dragging occurs.
AB - A new method is proposed to determine whether the effective stress for the viscous or quasi-viscous motion of dislocations exists or not in the deformation of crystalline materials. The crosshead speed is changed on the way of deformation and the work-hardening rate is measured immediately after the change. It is theoretically predicted that the work-hardening rate depends on whether the effective stress is negligible or not. Applying the method to high-temperature deformation of pure aluminum and Al-5.4 at.% Mg alloy, it is found that the effective stress is negligible in pure aluminum at all temperatures tested and in the alloy at temperatures where the dynamic strain aging occurs, while the stress is appreciable in the alloy at temperatures where the solute atmosphere dragging occurs.
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UR - http://www.scopus.com/inward/citedby.url?scp=0019637235&partnerID=8YFLogxK
U2 - 10.1016/0001-6160(81)90107-3
DO - 10.1016/0001-6160(81)90107-3
M3 - Article
AN - SCOPUS:0019637235
VL - 29
SP - 1815
EP - 1824
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
IS - 11
ER -