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CAI Ling. Effect of Temperature and Stress Ratio on Crack Growth Behavior of High Strength and Toughness 7055 Aluminum Alloy Section Material[J]. Materials and Mechanical Engineering, 2020, 44(8): 44-46,51. DOI: 10.11973/jxgccl202008009
Citation: CAI Ling. Effect of Temperature and Stress Ratio on Crack Growth Behavior of High Strength and Toughness 7055 Aluminum Alloy Section Material[J]. Materials and Mechanical Engineering, 2020, 44(8): 44-46,51. DOI: 10.11973/jxgccl202008009
shu

Effect of Temperature and Stress Ratio on Crack Growth Behavior of High Strength and Toughness 7055 Aluminum Alloy Section Material

  • Shanghai Aircraft Design and Research Institute, Shanghai 201210, China

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  • Received Date: April 02, 2020
  • Revised Date: June 11, 2020
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    • Abstract
  • Crack propagation rate tests of 7055-T76511 aluminum alloy section material under different temperatures (150 ℃, room temperature, -70 ℃)and stress ratios (0.1, 0.5) were carried out. The effect of temperature and stress ratio on crack propagation rate and threshold of the alloy was studied. The results show that with decreasing temperature and stress ratio, the threshold for crack propagation of 7055-T76511 aluminum alloy gradually increased, and the crack propagation rate gradually decreased. At -70 ℃, the crack growth rate when the alloy fractured was smaller, and the crack growth threshold was larger, showing the best crack growth resistance.
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