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Ti-6A1-4V 합금의 피로거동에 미치는 온도 , 주파수 및 미세조직의 영향
김현철(H. C. Kim),김승한(S. H. Kim),임병수(B. S. Lim),김두현(D. H. Kim),이용태(Y. T. Lee) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.1
The effect of temperature, frequency and microstructure on fatigue crack propagation property of Ti-6Al-4V alloy has been investigated. Teh temperatures employed were room temperature, 200°C and 400°C. The frequencies were 20Hz and 8Hz. The microstructures tested were equiaxed and bimodal microstructures. Mechanical properties and fatigue crack growth rates were measured in different test conditions. From the experimental results, following conclusions were obtained.1) Bimodal microstructure showed superior fatigue crack growth resistance to equiaxed microstructure.2) Under all test conditions, fatigue crack growth rate increased with test temperature.3) Wine the frequency decreasing from 20Hz to 8Hz, fatigue crack growth rate increased.