Selection of Engineering Materials

N.A.

Description

A key objective of any design is to define the dimensions of a component and the materials from which it is made so that it can perform a function acceptably. Materials selection ultimately depends upon the performance criteria of the product that usually includes aesthetics and cost effectiveness. Analyzing how a material is expected to perform with respect to requirements such as mechanical, electrical, and chemical requirements can be essential to the selection process. The design engineer translates product requirements into material properties. Characteristics and properties of materials that correlate with performances are referred to as engineering properties.

Sujets

• ENGINEERING
• Sciences et techniques

Informations

• Publié par: Dar Dejlah Publishers & Distributors
• Date de parution: 01 janvier 2011
• Nombre de lectures: 1
• EAN13: 9796500037585
• Langue: English
• Poids de l'ouvrage: 3 Mo

Extrait

SELECTION OF ENGINEERING MATERIALS ‐1‐

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SELECTION OF ENGINEERING MATERIALS

Edited by

Prof. Dr. Kahtan K. Al – Khazraji Dr. Osama S. Muhammed

Materials Engineering Department Materials Engineering Department

 University of Technology University of Technology

 Baghdad-Iraq Baghdad-Iraq

2011

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PREFACE

This book is edited for the third class students in the Materials Engineering Department at the University of Technology. The book is edited from many references but mainly from reference (4). It has been prepared with the awareness that its usefulness will depend on its simplicity and its ability to provide essential information in materials selection. The book is divided into fifteen chapters and since the students have some knowledge of the basic science of materials and materials engineering, the fundamentals of materials science have been omitted. Most of the chapters had took the same sequence and names of the chapters in reference (4) but we attempt to present in each chapter as brief as possible essential overview and information that the third class students need in their study about materials selection. The information and data presented in this book are not intended to be used as a substitute for more up-to-data and accurate information on the specific materials and processes. Such specific details can be obtained from in-house sources, testing laboratories, computer databases, material suppliers, data/information sources, consultants, and various institutions. References in this book represent examples for additional sources of materials and processes. Finally, we hope that this book will be useful for the students as a first step to be a materials selector. The Editors

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Introduction

1.1

1.2

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.3

1.4

2.1

CONTENTS

Subject

Chapter One

Principle Requirements for Decision – Making (Motivation for Selection)

Introduction

A new Product

Function

Physical attributes

Manufacturing Requirements

Cost of The Raw Materials

Customer Preference

Product Development

Problem Situations

Chapter Two

Cost Basis for Selection

Introduction

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Page No.

17

21

23

23

24

28

28

29

30

30

32

35

37

2.2

2.3

2.4

3.1

3.2

3.2.1

3.2.2

3.2.3

3.2.4

3.3

3.4

3.5

Subject

Cost

Cost – Effectiveness and Value Analysis

Analysis of Cost

Chapter Three

Failure Analysis

Introduction

The Causes of Failure in Service

Errors in Design

Inherent Defects in a Material Properly Selected

Defects Introduced During Fabrication

Deterioration in Service

The Mechanisms of Failure

Intercrystalline Failure

Transcrystalline Failure

Chapter Four

Specifications and Quality Control

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Page No.

37

42

43

47

49

50

50

51

51

52

52

53

54

59

The Strength of Metals

5.2

The Strength of Fiber -Reinforced Composites

5.4

The Strength of Wood

64

67

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69

The Strength of Concrete

62

61

62

Level of Strength

The Strength of Thermoplastics

Introduction

Subject

Specifications

Glossaries

Introduction

5.2.1

5.3

5.2.2

Assessment of Strength in Metallic Materials

5.6

5.5

Inspection and Quality Control

Chapter Five

5.1

4.5

4.6

78

Methods of test

63

70

61

4.3

4.1

4.4

Codes of practice

4.2

Page No.

71

72

Selection for Mechanical Properties (Strength)

77

81

84