Microstructure response of cryogenically-rolled Cu–30Zn brass to electric-current pulsing

ON THE ROOM-TEMPERATURE ANNEALING OF CRYOGENICALLY-ROLLED COPPER (Preprint)

Using electric current to surpass the microstructure breakup limit

The elongated droplets and grains can break up into smaller ones. This process is driven by the interfacial free energy minimization, which gives rise to a breakup limit. We demonstrated in this work that the breakup limit can be overpassed drastically by using electric current to interfere. Electric current free energy is dependent on the microstructure configuration. The breakup causes the el...

Microstructure Evolution during Electric Current Induced Thermomechanical Fatigue of Interconnects

We demonstrate the evolution of microstructure and deformation associated with the use of electrical methods for evaluating mechanical reliability of patterned interconnects on rigid substrates. Thermomechanical fatigue in aluminum and copper interconnects was induced by means of low frequency (100 Hz), high density (> 10 MA/cm) alternating currents, which caused cyclic Joule heating and associ...

Microstructure and microtexture of highly cold-rolled commercially pure titanium

The microstructure and texture evolution of a commercially pure titanium sheet during cold-rolling is investigated in detail by X-ray diffraction and by orientation imaging in the FEG-SEM and in the TEM. The experimental data are compared with simulation results obtained by a viscoplastic self-consistent model. The aim of this work is to provide with a detailed description of the fine scale def...

Microstructure and its Relationship to Mechanical Properties in Equal Channel Angular Rolled Al6061 Alloy Sheets

Equal channel angular rolling (ECAR) is a severe  plastic deformation (SPD) technique which has been used to produce metal sheets with ultra-fine grain structure. In the present work, the relationships between the mechanical properties and microstructure of samples during the ECAR process have been investigated. The Rietveld method was applied to analyze the X-ray diffraction pattern and to det...