Why are Ni3Al (γ') precipitates particularly effective at strengthening nickel-based superalloys?

Using the Tin_Lead phase diagram, at 40% tin at 200C, what is the composition of the liquid phase? and how much of hte material is in that phsae?

Define quenching. (a) What effects does it have on the microstructure? (b) How does this affect dislocation movement? (c) Why/how does this affect the properties?

1 a) Briefly describe the phenomenon of coring (also known as segregation) that occurs during solidification in isomorphous alloys and why it occurs? b) Cite one undesirable consequence of coring?

Cite the phases that are present and the phase compositions for the following alloys: 15 wt% Sn–85 wt% Pb at 100°C

The solubility of tin in lead matches that required for precipitation hardening. Yet tin does not age-harden lead satisfactorily. Suggest a reason why it does not.

1- Describe, with using necessary diagrams, the structure of plain carbon steel (0.25% C). 2- explain the heat treatment and quenching process of plain carbon steel.

1. Given the time-temperature transformation diagram, what would be the phases present for a 1.13 wt. % C steel with no alloying elements. calculate the amount of pro eutectoid product, where applicable (at the bottom)  A) quenched in cold water to 650 C in 0.1 seconds, then held at 650 C for 5 seconds, then quenched to 400 C, held at 400C for 60 seconds, and finally quenched to room temperature B. Necessary Steel Phase Diagram Calculations to determine the amount of pro eutectoid product:

Identify the microstructures of each of expected to be found in each of these alloys  1095 furnace cooled from 1650 farenheight 1095 air cooled from 1650 farenheight 1095 water quenched from 1650 farenheight

Determine the fraction of eutectoid cementite with 0.84 wt.% C in the iron-carbon alloy.