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Observation and modeling of heteroge...

Woodmansee, Michael William.

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Observation and modeling of heterogeneous microstructural evolution in tin-lead solder.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Observation and modeling of heterogeneous microstructural evolution in tin-lead solder./
Author:	Woodmansee, Michael William.
Description:	161 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-06, Section: B, page: 2887.
Contained By:	Dissertation Abstracts International64-06B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3095765

Observation and modeling of heterogeneous microstructural evolution in tin-lead solder.
Woodmansee, Michael William.

Observation and modeling of heterogeneous microstructural evolution in tin-lead solder. - 161 p.

Source: Dissertation Abstracts International, Volume: 64-06, Section: B, page: 2887.

Thesis (Ph.D.)--Georgia Institute of Technology, 2003.

The effect of three vastly different initial microstructures and complementary stress states on the deformation and heterogeneous coarsening behavior of 60Sn-40Pb is investigated experimentally. The response of these material microstructures under uniaxial compression, pure shear and hydrostatic compression at 125°C is evaluated on length scales ranging from mm to mum. Local inelastic shear strain concentrations correlate strongly with regions where heterogeneously coarsened bands nucleate, and inelastic deformation precedes accelerated coarsening and damage accumulation at this temperature. The strain concentrators---which include corners, cracks, voids and grain boundaries---span length scales. The presence of purely volumetric strains is insignificant in the formation of coarsened bands. Particle and grain boundary sliding, active in 60Sn-40Pb above 23°C, is further enhanced within the heterogeneously coarsened region.Subjects--Topical Terms:

783786
Engineering, Mechanical.

Observation and modeling of heterogeneous microstructural evolution in tin-lead solder.
LDR:02879nmm 2200289 4500 001 1861911
005 20041215074119.5
008 130614s2003 eng d
035 $a (UnM)AAI3095765
035 $a AAI3095765
040 $a UnM $c UnM
100 1 $a Woodmansee, Michael William. $3 1949490
245 1 0 $a Observation and modeling of heterogeneous microstructural evolution in tin-lead solder.
300 $a 161 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-06, Section: B, page: 2887.
500 $a Director: Richard W. Neu.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2003.
520 $a The effect of three vastly different initial microstructures and complementary stress states on the deformation and heterogeneous coarsening behavior of 60Sn-40Pb is investigated experimentally. The response of these material microstructures under uniaxial compression, pure shear and hydrostatic compression at 125°C is evaluated on length scales ranging from mm to mum. Local inelastic shear strain concentrations correlate strongly with regions where heterogeneously coarsened bands nucleate, and inelastic deformation precedes accelerated coarsening and damage accumulation at this temperature. The strain concentrators---which include corners, cracks, voids and grain boundaries---span length scales. The presence of purely volumetric strains is insignificant in the formation of coarsened bands. Particle and grain boundary sliding, active in 60Sn-40Pb above 23°C, is further enhanced within the heterogeneously coarsened region.
520 $a Feature-based modeling of the interaction between individual grains and phases is performed to better understand the phenomenon of heterogeneous coarsening. Microstructural evolution of 60Sn-40Pb is simulated using a kinetic Monte Carlo model designed to describe grain growth and coarsening in a two-phase material. From this model, the evolution of ensembles of discrete grains and second phase regions is described explicitly using two simple rules: one describing grain growth, the other describing interfacial diffusion-driven phase coarsening. This coarsening model is then coupled to a finite element model in order to incorporate thermomechanical interaction with microstructural evolution. Local diffusivity is modeled as a function of the local maximum shear strain. The results of these simulations support the hypothesis that the elastic component of loading is not significant in the formation of coarsened bands, leaving inelastic strains as the main driving force for coarsened band nucleation and growth.
590 $a School code: 0078.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Metallurgy. $3 1023648
690 $a 0548
690 $a 0794
690 $a 0743
710 2 0 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 64-06B.
790 1 0 $a Neu, Richard W., $e advisor
790 $a 0078
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3095765