6533b839fe1ef96bd12a6436
RESEARCH PRODUCT
Direct observation of strain-induced non-equilibrium grain boundaries
M. F. BulatovBrigitte BaretzkyFaina MuktepavelaP. B. StraumalK. I. KolesnikovaK. I. KolesnikovaBoris B. StraumalBoris B. StraumalBoris B. StraumalO. A. Kogtenkovasubject
Phase transitionMaterials scienceAnnealing (metallurgy)Mechanical EngineeringEquilibrium conditionsAnalytical chemistryDirect observationCondensed Matter PhysicsCrystallographyMechanics of MaterialsGeneral Materials ScienceGrain boundaryWettingEutectic systemdescription
Abstract The grain boundary (GB) wetting by the melt and second solid phase has been studied in the Sn–Pb system both in equilibrium conditions and during continuous strain. The percentage of Sn/Sn GBs completely wetted by the melt increases from 80% at eutectic temperature Te=183 °C to 100% at 220 °C. The percentage of Pb/Pb GBs completely wetted by the melt increases from 0% at Te to 100% at 270 °C. Below Te only incomplete wetting of Pb/Pb GBs by solid Sn and Sn/Sn GBs by solid Pb has been observed after long annealing. However, during strain the lattice dislocations are continuously absorbed by GBs increasing the GB energy. As a result, the complete wetting of such non-equlibrium Sn/Sn GBs by the second solid phase Pb appears. Therefore, the difference in energies between equilibrium and non-equilibrium grain boundaries has been experimentally demonstrated for the first time.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-01 | Materials Letters |