Fatigue of Aluminium Alloys
Explore the fatigue of aluminium alloys at high and low temperatures. Discover how these properties affect the performance of aluminum materials.
Properties of Aluminum Alloys: Tensile, Creep and Fatigue Data at High and Low Temperatures
by J. Gilbert Kaufman (2000)
Abbreviated CONTENTS
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
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
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
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
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
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
7 Effects of Microstructure and Microporosity
- Effect of Degree of Recrystallization
- Grain Size
- Ultrasonic Quality
- Microporosity
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
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
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
