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Chapter 11: Problem 11

What is the chief difference between heat- treatable and non-heat-treatable alloys?

Short Answer

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Short Answer: The main difference between heat-treatable and non-heat-treatable alloys is their response to heat treatment processes. Heat-treatable alloys can have their mechanical properties significantly altered by undergoing heat treatment due to the presence of precipitate-forming elements, while non-heat-treatable alloys cannot, as their properties are mainly determined by their composition and manufacturing processes.

Step by step solution

01

Definition of Heat-treatable Alloys

Heat-treatable alloys are those alloys whose mechanical properties can be significantly altered by heat treatment processes, such as hardening or softening. These alloys usually contain a certain amount of precipitate-forming elements, which leads to the formation of small particles within the metal matrix when subjected to controlled heating and cooling cycles.
02

Definition of Non-heat-treatable Alloys

Non-heat-treatable alloys, on the other hand, have their mechanical properties mainly determined by their composition and the manufacturing processes used in their production. These alloys cannot be strengthened or softened by heat treatment alone as they lack the precipitate-forming elements present in heat-treatable alloys.
03

Main Difference Between Heat-treatable and Non-heat-treatable Alloys

The chief difference between heat-treatable and non-heat-treatable alloys is their response to heat treatment processes. Heat-treatable alloys can have their mechanical properties significantly altered by undergoing heat treatment, while non-heat-treatable alloys cannot. This difference is primarily due to the presence of precipitate-forming elements in heat-treatable alloys, which enable the alteration of their properties through controlled heating and cooling cycles.

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Most popular questions from this chapter

In your own words, describe the following heat-treatment procedures for steels and, for each, the intended final microstructure: (a) full annealing (b) normalizing (c) quenching (d) tempering.

Compare precipitation hardening (Section 11.9) and the hardening of steel by quenching and tempering (Sections 10.5, 10.6, and 10.8) with regard to the following: (a) The total heat treatment procedure (b) The microstructures that develop (c) How the mechanical properties change dur- ing the several heat treatment stages

Briefly explain the difference between hard- ness and hardenability.

Give the approximate minimum temperature at which it is possible to austenitize each of the following iron–carbon alloys during a normal- izing heat treatment: (a) 0.15 wt% C (b) 0.50 wt% C (c) 1.10 wt% C.

(a) List the four classifications of steels. (b) For each, briefly describe the properties and typical applications.
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