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Fatigue Properties of Aluminium Alloys


Properties of Aluminum Alloys: Tensile, Creep and Fatigue Data at High and Low Temperatures
by J. Gilbert Kaufman (2000)

Abbreviated CONTENTS

Chapter 1: Introduction and Background

  • Source of Fatigue Data
  • Style of Presentation of Fatigue Data
    • Aluminum Association Alloy and Temper Designation Systems
    • Units Systems
  • Applicability and Cautions in Use of the Data
    • Applicability of Small-Specimen Fatigue Data
    • Residual-Stress Effects May Be Present
    • Current versus Inactive Alloys

Chapter 2: Descriptions of Specimens and Test Procedures

  • Rotating-Beam Reversed-Bending Fatigue Tests at Room Temperature
  • Rotating-Beam Reversed-Bending Fatigue Tests at Elevated Temperatures, with and without Prior Holding at Various Temperatures
  • Flexural Fatigue Tests at Room Temperature
  • Axial-Stress Fatigue Tests at Room, Subzero, and Elevated Temperatures
  • Torsional Fatigue Tests
  • Testing Laboratory Environment
  • S-N Plots of Stress versus Fatigue Life
  • Modified Goodman Fatigue Diagrams
  • Effects of Testing Machine Variables
    • Sheet-Flexural Testing Machines
    • Rotating Simple versus Rotating Cantilever Beam
    • Specimen Preparation Variables
    • Preparation for Cast Specimens and Relation to Residual Stresses

Chapter 3: Presentation of Fatigue Data

  • Alloy Presentation Sequence
  • Temper Presentation Sequence
  • S-N Curve and Goodman Diagram Numbering System
  • Tabular Summaries of Fatigue Strengths
  • Inactive Alloys
  • General Notes
  • Data Set—Sequence of Curves by Alloy

Chapter 4: General Observations and Comparisons

  • Total Data Spread among Alloys
  • Data Band Width
  • Questions about the Existence of an Endurance Limit
  • Specimen Directional Effects
  • Correlations with Static Strength

Chapter 5: Comparisons of Fatigue Properties of Various Alloys, Tempers, and Products

  • Wrought Alloys
    • 1xxx Pure Aluminum
    • 2xxx Alloys
    • 3xxx Alloys
    • 4xxx Alloys
    • 5xxx Alloys
    • 6xxx Alloys
    • 7xxx Alloys
  • Comparison of Different Wrought Products
    • Extruded Shapes
    • Thick Plate, Forgings, and Extruded Shapes
  • Wrought Product Temper
    • Annealed (O) Temper
    • Strain-Hardening Tempers, H-Type
    • Heat Treat Tempers, T-Type
  • Comparison of Wrought versus Cast Alloys
  • Comparisons of Some Cast Aluminum Alloys
    • Premium-Strength Casting Alloys
  • Effect of Surface Cladding

Chapter 6: Influence of Production Process Variables on Fatigue Properties

  • Wrought Alloy Processing Practices
    • Effect of Type of Starting Stock for Forgings
    • Effect of Strain Hardening on Fatigue Strength
    • Effect of Solution Heat Treatment on Fatigue Strength
    • Coiled Sheet versus Flat Sheet
    • Effect of Continuous versus Batch Heat Treating of Sheet
    • Effect of Type of Quench Following Heat Treatment
    • Effect of Precipitation Age Hardening
    • Effect of Stress Relief
    • Effect of Additional Cold Work Following Solution Heat Treatment
    • Variation in Fatigue Properties in Thick versus Thin Plate and Forgings
    • Variation in Fatigue Properties in Large Cross-Sectional and Long-Length Extruded Products
  • Casting Alloy Process Practices
    • Comparison of Casting Processes
    • Improvements with Time
    • Sand, Permanent Mold, and Die Casting Differences
    • Effects of Porosity
    • Premium Casting Practices
    • Squeeze Casting

Chapter 7: Effects of Microstructure and Microporosity

  • Effect of Degree of Recrystallization
  • Grain Size
  • Ultrasonic Quality
  • Microporosity

Chapter 8: Influence of Fabrication Finishing Variables on Fatigue Properties

  • Surface Treatments and Conditions
    • Anodizing and Related Oxide-Based Coatings
    • Automotive Body Sheet Finishing
    • Porcelain Enameling
    • Nitric Acid and Other Etchants
    • Chemical Milling
    • Extrusion Die Lines on the Surface
    • Surface Rolling and Peening
    • Flash Coating with Copper
    • Ni-SiC Electrochemical Plating
  • Joining Techniques
    • Fusion Welding
    • Flash Welding
    • Brazing
    • Alforging
    • Riveting

Chapter 9: Effect of Temperature and Environment

  • High Temperatures
    • Influence of High Temperature on Fatigue Strength of Wrought Alloys
    • Effect of Long Holding Times at Elevated Temperatures for Wrought Alloys
    • Influence of High Temperature on Fatigue Strength of Cast Alloys
  • Subzero Temperatures
  • Effect of Environment

Chapter 10: Effect of Stress Concentrations, Primarily Sharp Notches

  • 1 Notch Severity
  • 2 Notches and Strain-Hardening Wrought Alloys
  • 3 Notches and Solution Heat Treating and Precipitation Aging Wrought Alloys
  • 4 Notches in the Surface of Clad Sheet
  • 5 Notches in Casting Alloys

Fatigue Diagrams Index


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