Aluminium and aluminium alloy

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Objectives • This chapter provides fundamental knowledge of different methods of productions / heat treatments of aluminium alloys and the use of various types of cast and wrought aluminium alloys. • The influences of alloy composition, microstructure and heat treatment on chemical and mechanical properties of aluminium alloys will be discussed in relation to its applications. Suranaree University of Technology Tapany Udomphol May-Aug 2007
Introduction- Why aluminium alloys? • Abundant element of 8% on earth crust and normally found in oxide forms (Al 2 O 3 ), i.e., bauxite, kaolinite, nepheline and alunite. • Found in United states, Italy, France. • Have not been found in Thailand but in Malaysia, Vietnam. Bauxite with penny Bauxite-pebbly Kaolinite http://www.galleries.com Suranaree University of Technology Tapany Udomphol May-Aug 2007
Page 1: Lecture 2 Aluminium and its alloys
Page 5 and 6: Applications for aluminium alloys C
Page 7 and 8: Extraction of aluminium Aluminium c
Page 9 and 10: Bayer process Second step • The n
Page 11 and 12: Schematic diagram of Bayer process
Page 13 and 14: Hall-Héroult process • Aluminium
Page 15 and 16: Mechanism of electrolytic reaction
Page 17 and 18: Physical metallurgy of aluminium FC
Page 19 and 20: Phase diagrams of aluminium with va
Page 21 and 22: Heat treatments in aluminium alloys
Page 23 and 24: 1) The GP zone •The GP zones are
Page 25 and 26: Precipitate free zones (PFZ) at gra
Page 27 and 28: Hardening mechanisms • Hardening
Page 29 and 30: Relationship between strength and p
Page 31 and 32: Corrosion in aluminium alloys Surfa
Page 33 and 34: Contact with dissimilar metals •
Page 35 and 36: Surface pitting and exfoliation cor
Page 37 and 38: Mechanical behaviour of aluminium a
Page 39 and 40: 4) Grain size and shape • Alumini
Page 41 and 42: Toughness • Toughness is resistan
Page 43 and 44: Metallurgical factors influencing f
Page 45 and 46: Metallurgical features influencing
Page 47 and 48: Creep • Creep fracture (at high t
Page 49 and 50: Continuous casting process • The
Page 51 and 52: Control of metallurgical structure
Page 53 and 54:
Homogenisation of DC ingots Homogen
Page 55 and 56:
Thermal treatment Thermal treatment
Page 57 and 58:
Quenching 2) Hot or boiling water q
Page 59 and 60:
Thermo-mechanical processing Thermo
Page 61 and 62:
Alloy identification systems Temper
Page 63 and 64:
Work-hardening of aluminium and its
Page 65 and 66:
Work-hardening characteristics Duri
Page 67 and 68:
Designations of wrought aluminium a
Page 69 and 70:
Super-purity and commercial-purity
Page 71 and 72:
Al-Mg alloys (5xxx series) • Mg (
Page 73 and 74:
Miscellaneous alloys (8xxx series)
Page 75 and 76:
Al-Cu alloys (2xxx series) • Prec
Page 77 and 78:
Al-Mg-Si alloys (6xxx series) • M
Page 79 and 80:
Al-Mg-Si alloys (6xxx series) Mg +
Page 81 and 82:
Example: Age-hardening in Al-Cu all
Page 83 and 84:
Effects of time and temperature of
Page 85 and 86:
Cast aluminium alloys Properties re
Page 87 and 88:
British System • Designation of c
Page 89 and 90:
Alloys based on the Al-Si system Th
Page 91 and 92:
Modification of microstructure •
Page 93 and 94:
Example: Modification with Na • M
Page 95 and 96:
Over modification • Over modifica
Page 97 and 98:
Al-Cu alloy • Strength and hardne
Page 99 and 100:
Al-Zn-Mg alloys • Binary Al-Zn al
Page 101 and 102:
Sand casting • Versatile - comple
Page 103 and 104:
Semi-solid processing (Thixo-castin
Page 105 and 106:
Squeeze casting • The process inv
Page 107 and 108:
Cosworth Process • The Cosworth P
Page 109 and 110:
Comparison of mechanical properties
Page 111 and 112:
References • P. Thevoz, M. Gauman
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Aluminium and aluminium alloy

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