Thermal cycling reliability of aged PBGA assemblies-comparison of Weibull failure data and finite element model predictions

MM Basit, M Motalab, JC Suhling, Z Hai… - 2015 IEEE 65th …, 2015 - ieeexplore.ieee.org
Isothermal aging causes detrimental changes in the microstructure, mechanical response,
and failure behavior of lead free solder joints in electronic assemblies. These material …

Visualization of microstructural evolution in lead free solders during isothermal aging using time-lapse imagery

N Fu, S Ahmed, JC Suhling… - 2017 IEEE 67th Electronic …, 2017 - ieeexplore.ieee.org
In this investigation, Scanning Electron Microscopy (SEM) and Scanning Probe Microscopy
(SPM) have been utilized to examine aging induced microstructural changes occurring …

Mechanical characterization of doped SAC solder materials at high temperature

MR Chowdhury, S Ahmed, A Fahim… - 2016 15th IEEE …, 2016 - ieeexplore.ieee.org
Reliable lead free solders are needed for products exposed to extreme environments such
as those used in the automotive, avionics, and oil-exploration industries, as well as in …

Evolution of the cyclic stress-strain and constitutive behaviors of doped lead free solder during fatigue testing

MA Hoque, MM Chowdhury, N Fu… - 2018 17th IEEE …, 2018 - ieeexplore.ieee.org
One of the most common method of failure in electronic packaging is the fatigue failure of
solder joints. The constituent materials forming the electronic assembly have different …

Characterization of material damage and microstructural evolution occurring in lead free solders subjected to cyclic loading

MM Chowdhury, MA Hoque, N Fu… - 2018 IEEE 68th …, 2018 - ieeexplore.ieee.org
In this investigation, the effects of isothermal mechanical cycling on damage accumulation in
lead free SAC305 and SAC_Q (SAC+ Bi) solder joints have been explored. In particular, we …

High temperature creep response of lead free solders

A Fahim, S Ahmed, MR Chowdhury… - 2016 15th IEEE …, 2016 - ieeexplore.ieee.org
Lead free solder materials are susceptible to significant creep deformations in harsh high
temperature environments including automotive, avionics, military, and oil exploration …

Nanomechanical characterization of SAC solder joints-reduction of aging effects using microalloy additions

M Hasnine, JC Suhling, BC Prorok… - 2015 IEEE 65th …, 2015 - ieeexplore.ieee.org
In this work, we have examined the ability of microalloy additions (dopants) to reduce aging
effects in solder joints by nanoindentation testing of several sets of doped/non-doped alloys …

Cyclic Stress-Strain Behavior of SAC305 Lead Free Solder: Effects of Aging, Temperature, Strain Rate, and Plastic Strain Range

N Fu, JC Suhling, P Lall - 2016 IEEE 66th Electronic …, 2016 - ieeexplore.ieee.org
Solder joints in electronic assemblies are often subjected to cyclic (positive/negative)
mechanical strains and stresses. Such exposures can occur in variable temperature …

Mechanical characterization of SAC solder joints at high temperature using nanoindentation

S Ahmed, M Hasnine, JC Suhling… - 2017 IEEE 67th …, 2017 - ieeexplore.ieee.org
In this work, we have used nanoindentation methods to explore the creep behavior, and
aging effects of SAC305 solder joints at several elevated testing temperatures from 25 to …

The anand parameters of aging resistant doped solder alloys

S Ahmed, JC Suhling, P Lall - 2017 16th IEEE Intersociety …, 2017 - ieeexplore.ieee.org
Due to growing environmental concerns, lead-free solder materials are being widely used in
electronic assemblies. The Anand viscoplastic constitutive model is frequently used to …