The near eutectic 60%-40Pb alloy is the most commonly used solder for electrical interconnections in electronic packages. This alloy has a number of processing advantages (suitable melting point of 183°C and good wetting behavior). However, under conditions of cyclic strain and temperature (thermomechanical fatigue), the microstructure of this alloy undergoes a heterogeneous coarsening and fail...

The Al–Si–Mg casting alloy was modified by strontium, and the microstructural classification of unmodified Sr samples accomplished using our originally developed methods machine learning techniques. rates were at high levels highest rate reached 97.5% accuracy when statistical data support vector as classifier. additive caused distribution eutectic-Si particles to change from a random clusterin...

Solidification is an important process in many alloy processing routes. The solidified microstructure of alloys usually made up dendrites, eutectics or a combination both. evolving morphologies are largely determined by the solidification and thus materials properties dependent on conditions. While growth either type well-investigated, there little information coupled both microstructures. This...

This study aims at assessing the effect of solution heat treatment (at a temperature just below eutectic temperature) followed by various cooling rates on microstructure and mechanical properties additively manufactured AlSi10Mg cast counterpart. The were evaluated using depth-sensing nanoindentation platform. parts solutionized 540 ​°C for 2 ​h water quenching, air cooling, furnace cooling. Re...

than that formed with a large back-diffusion (large dilution). DURING the solidification of a dendritic alloy, the solThere are, however, other micro scale mechanisms besides ute rejected at the solid/liquid interface is redistributed, at back-diffusion that control the dilution of the liquid phase, the local scale of the secondary dendrite arm spacings (10 in particular the coarsening of the m...

The 25Cr-35Ni heat resistant steel has been widely used when resistance to oxidation and creep rapture at elevated temperatures is required. In this paper, the microstructural effect on the weldability of this alloy is investigated. The results of this study indicate that this steel has a perfect weldability in the as cast condition but does not possess good weldability in the aged condition. T...

A nickel-based single-crystal superalloy was employed to investigate the preferred growth orientation behavior of the (γ + γ') eutectic and the effect of these orientations on the segregation behavior. A novel solidification model for the eutectic island was proposed. At the beginning of the eutectic island's crystallization, the core directly formed from the liquid by the eutectic reaction, an...