GB/T 26077-2021Metallic materials - Fatigue testing - Axial-strain-controlled method (English PDF)

National Standard of the People's Republic of China

ICS

77.040.10

Classification

H22

Issued by: State Administration for Market Regulation, China National Standardization Administration

Contents

• 1 Scope
• 2 Normative references
• 3 Terms and definitions
• 4 Symbol
• 5 Test equipment
• 6 Sample
• 7 Test procedure
• 8 High temperature strain control creep-fatigue test
• 9 Result expression
• 10 Test report
• 1 Scope
• 2 Normative references
• 3 Terms and definitions
• 3.1 Engineering stress
• 3.2 True stress
• 3.3 Initiallength
• 3.4 Parallel length
• 3.5 Strain
• 3.6 Cycle
• 3.7 Maximum
• 3.8 Minimum
• 3.9 Mean
• 6.2 Preparation of test samples
• 6.2.1 General requirements
• 6.2.2 Machining program
• 6.2.3 Sampling and marking
• 6.2.4 Surface condition of the sample
• 6.2.5 Dimension check
• 6.2.6 Storage and transportation
• 7 Test procedure
• 7.1 Laboratory environment
• 7.2 Test machine control
• 7.3 Installation of the sample
• 7.4 Cycle Waveform-Strain Rate or Cycle Frequency
• 7.5 Test procedure
• 7.5.1 Forecast
• 7.5.2 Start test
• 7.6 Number of samples
• 7.7 Test record
• 7.7.1 Stress-strain hysteresis loop
• 7.7.2 Data Collection
• 7.8 Test abort
• 7.9 Failure criterion
• 8 High temperature strain control creep-fatigue test