同济大学：《工程材料》课程电子教案（课件讲稿）Chapter 1 Introduction to Engineering Material（负责人：杨玉娟）

190> ONGIL UN1VER、→ Chap1 Introduction

Chap1 Introduction

190 1.Introduction of material science (1)Materials Science Materials science is the study of the relationship occurring between forming, structure,properties and performances of the materials. Properties are the way in which the material behaves when external stresses are applied

(1) Materials Science Materials science is the study of the relationship occurring between forming, structure, properties and performances of the materials. Properties are the way in which the material behaves when external stresses are applied. 1. Introduction of material science

190 TONGJI UN7 VERS◆ (2)The four elements of material science Component structure property forming processing performance

Component & structure forming & processing performance property (2)The four elements of material science

190> 3)Materials properties Mechanical properties->Mechanical stresses,strength,etc... Thermal properties->Linked to the heat transmission and to the thermal capacity Electrical and magnetic properties- Electric and magnetic fields,electric conductivity,etc. Optical properties->Include absorption, transmission,light diffusion Chemical inertness->Interactions with the environment,corrosion resistance

(3)Materials properties Mechanical properties→ Mechanical stresses, strength, etc… Thermal properties → Linked to the heat transmission and to the thermal capacity Electrical and magnetic properties→ Electric and magnetic fields, electric conductivity, etc. Optical properties→ Include absorption, transmission, light diffusion Chemical inertness → Interactions with the environment, corrosion resistance

190> 悠 TONGJI UNIVER◆ 2.Engineering material (1)Applications of engineering material

(1)Applications of engineering material 2.Engineering material

190 (2)Definition Engineering material is used in machinery, vehicles,ships,construction,chemical, energy,instrumentation,aerospace and other fields

(2) Definition Engineering material is used in machinery, vehicles, ships, construction, chemical, energy, instrumentation, aerospace and other fields

490> TONGJI UNIVERSITY Metal Polymer (3)Classification of engineering material Ceramic Composite

(3) Classification of engineering material Polymer Metal Ceramic Composite

4902 TONGJI UN1VER≤令 Metal Science Polymer Science (4)Basic Material Science Theory Ceramic Science Composite Science

(4) Basic Theory Metal Science Polymer Science Ceramic Science Composite Science Material Science

190> 3.How to study this course (1)Key points One Clue:relationship between material's component-structure-property Two figures:Fe-Fe;C diagram,TTT curve Three kinds of material:carbon steel,alloy steel, cast iron Four main heat treatments:annealing, normalizing,quenching,tempering

(1) Key points One Clue: relationship between material’s component –structure-property Two figures: Fe-Fe3C diagram, TTT curve Three kinds of material: carbon steel, alloy steel, cast iron Four main heat treatments: annealing, normalizing, quenching, tempering 3. How to study this course

190> (2)Requirements 1)Understand the crystal structure,the process of metal crystallization,the general law of solid state transformation. 2)Master the general relationship between material component-structure-heat treatment,be able to make technology route of processing and heat treatment. 3)Understand usual metal materials and learn to how to choose them. Clue:relationship between component- structure-property

(2) Requirements 1) Understand the crystal structure, the process of metal crystallization, the general law of solid state transformation. 2) Master the general relationship between material component-structure-heat treatment, be able to make technology route of processing and heat treatment. 3) Understand usual metal materials and learn to how to choose them. Clue: relationship between component￾structure-property