Materials Science and Engineering

Prof. Seung Tae CHOI ( )

22 SCHOOL OF MECHANICAL ENGINEERINGLECTURER: PROF. SEUNGTAE CHOI

Materials Science and Engineering

Instructor: Prof. Seung Tae CHOI ( )

Textbook:

Evaluation

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Chapter 1. Introduction

What is materials science?Materials science

Materials engineering

Why should we know about it?

Materials drive our society

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Example: Titanic on April 15, 1912

RMS Titanic

Titanic

Liberty Ship during World War II

Ductile to Brittle Transitionof Steel upon Cooling

55 SCHOOL OF MECHANICAL ENGINEERINGLECTURER: PROF. SEUNGTAE CHOI

Processing, Structure, Properties, & Performance

Four Components for Design, Production, and Utilization of Materials

Structure

Property

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Processing, Structure, Properties, & Performance

Processing can change structure

Properties depend on structure

Callister& Rethwisch 9e

Callister & Rethwisch 9e

(d)

30 m(c)

4 m

(b)

30 m

(a)

30 m

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Example: Ultra High Strength Steel

Example of hot stamped parts

••••••••••••

The skeleton of the Mercedes CL

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The Materials Selection Process

TheMaterials Selection Process

Three criteria important in the materials selection process

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Classification of Materials: Metals

Based on chemical makeup and atomic structure, solid materials canbe grouped into three basic categories: metals, ceramics, and polymers.

Metals:

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Classification of Materials: Ceramics & Polymers

Ceramics

Polymers

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Typical Material Properties

Fig. 1.4 Fig. 1.5

Fig. 1.7 Fig. 1.6

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Advanced Materials & Modern Materials’ Needs

Advanced MaterialsSemiconductors

Biomaterials

Smart (or intelligent) materials

Nanomaterials

Modern Materials’ Needs