Accession Number:

AD1069850

Title:

Influence of Electric Current on the Mechanical Deformation of Metals

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Ruldolf, Christopher C.
• Kang, Won M.
• Kindle, Christopher J.
• Qidwai, Siddiq M.
• Pande, Chandra
• Thomas, James P.

Report Date:

2019-02-27

Pagination or Media Count:

49

Abstract:

This report describes novel experiments developed to characterize electron-dislocation interactions in umnm-scale specimens via in situ transmission electron microscopy TEM and tensile deformations of mm-scale specimens with applied electric currents and cooling that decoupled Joule heating from the current. The TEM results showed no apparent electron-dislocation interactions at current densities up to 5000Amm2 with single-crystal Cu, and the coupled-tensile testing results showed large current effects on the plastic deformation of polycrystalline Ti but no effects with Cu and Fe.

Descriptors:

• crystal structure
• crystals
• temperature control
• temperature gradients
• electron microscopy
• heat transfer
• modulus of elasticity
• thermal conductivity
• data acquisition
• grain boundaries
• grain size
• materials
• materials testing
• measurement
• stress strain relations
• test methods
• creep
• current density
• electric current
• electron microscopes

Subject Categories:

• Electricity and Magnetism
• Mechanics
• Properties of Metals and Alloys

Distribution Statement:

[A, Approved For Public Release]