THE HARDENING OF COPPER SINGLE CRYSTALS BY ELECTRON IRRADIATION
Irradiation with 4 Mev electrons was found to increase the critical shear stress of copper single crystals and to raise the whole stress-strain curve to higher stresses. The effect is independent of the irradiation temperature below a dose of ~5 mu a/hr cm/sup -2/; above this dose the critical shear stress of specimens irradiated at 20 deg C increases to a saturation value of 0.5 kg mm/ after 40 mu a/hr cm/sup -2/. Specimens irradiated at -195 deg C, however, cortinue to harden and after 100 mu a/hr cm/sup -2/ have a critical shear stress of 1 kg/mm/sup 2/. Crystals irradiated at -78 deg C lie on an irtermediate curve indicating that the rate of hardening is a cortinuous function of the temperature and is not due to irradiating above or below a particular recovery stage. Annealing at 20 deg C after irradiation at - 195 deg C produces only ~10 per cert recovery in shear stress. The arnealing of the hardening after irradiation at 20 deg C commences at ~80 deg C and continues up to temperatures above 400 deg C. No discrete recovery stages are visible. Thin film transmission electron microscopy does not reveal any clustered damage. Electron hardening is compared in detail with that due to neutron hardening and it is concluded that the absence of the displacement spikes has a very profound effect. (auth)
- Research Organization:
- Atomic Energy Research Establishment, Harwell, Berks, Eng.
- NSA Number:
- NSA-16-015250
- OSTI ID:
- 4796482
- Report Number(s):
- AERE-R-3800
- Journal Information:
- Acta Met., Journal Name: Acta Met. Vol. Vol: 10
- Country of Publication:
- United Kingdom
- Language:
- English
Similar Records
A STUDY ON HIGH TEMPERATURE STRESS RUPTURE PROPERTIES OF LARGE WELDED JOINT OF STAINLESS CLAD STEEL FOR ATOMIC REACTOR
ENERGY RELEASE IN REACTOR-IRRADIATED COPPER. PART II. 600 TO 700 K RELEASE
HARDENING OF COPPER SINGLE CRYSTALS IRRADIATED AT-195 C
Journal Article
·
Mon Dec 31 23:00:00 EST 1962
· Trans. Natl. Res. Inst. Metals (Tokyo)
·
OSTI ID:4088734
ENERGY RELEASE IN REACTOR-IRRADIATED COPPER. PART II. 600 TO 700 K RELEASE
Journal Article
·
Fri Mar 31 23:00:00 EST 1961
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4053384
HARDENING OF COPPER SINGLE CRYSTALS IRRADIATED AT-195 C
Journal Article
·
Mon Mar 31 23:00:00 EST 1958
· Acta Met.
·
OSTI ID:4271499
Related Subjects
ANNEALING
COPPER
CRYSTALS
DEFECTS
DEFORMATION
DISTRIBUTION
ELECTRON BEAMS
ELECTRON MICROSCOPY
HARDNESS
IRRADIATION
LATTICES
LOW TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
NEUTRON BEAMS
RADIATION DOSES
RADIATION EFFECTS
SATURATION
SHEAR
STRESSES
TEMPERATURE
TEMPERING
TENSILE PROPERTIES
TRANSIENTS
COPPER
CRYSTALS
DEFECTS
DEFORMATION
DISTRIBUTION
ELECTRON BEAMS
ELECTRON MICROSCOPY
HARDNESS
IRRADIATION
LATTICES
LOW TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
NEUTRON BEAMS
RADIATION DOSES
RADIATION EFFECTS
SATURATION
SHEAR
STRESSES
TEMPERATURE
TEMPERING
TENSILE PROPERTIES
TRANSIENTS