Eutectic Microstructure Binary Phase Diagrams. C a b. Reprinted by permission of asm international materials park oh amse 205 spring 2016 chapter 12 15 the fe fe3c eutectoid transformation coarse pearlite formed at higher temperatures relatively soft fine pearlite formed at lower temperatures relativelyhard.
The choice of specific solder alloys depends on their melting point chemical reactivity mechanical properties toxicity and other propertieshence a wide range of solder alloys exist and only major ones are listed below. Adapted from binary alloy phase diagrams 2nd edition vol. The eutectic transformation is usually defined as.
I phases present ii composition of phases present iii percentages of the phase.
Xrd patterns showed that the resulting material is mainly composed of a single bcc crystal structure in the base alloy monbre05w and a multi component mc type carbide of nb ta mo wc to form a lamellar eutectic structure with the amount of mc phase proportional to tac addition. The phase diagram has been an essential tool for materials development and processing for very many years. 4 hypereutectoid alloys hypereutectoid steel. The temporal and spatial evolution of the field.