Influence of Sizes of Inclusions and Voids on Fracture Toughness of Ultra-High Strength Steel AerMet100
Mechanical properties of the ultra-high strength steel AerMetl00 aged at 454℃～510℃ were studied, and relationship between the critical crack tip opening displacement δIC and X0 (RV/RI ) |R0 was calculated, where X0was an average inclusion spacing and (RV/RI ) |R0 was the void radius RV divided by the radius of the inclusion RInucleating the void evaluated at the average inclusion size R0. The results showed that high fracture toughness could be reached after aging at 510 ℃, and aging temperature affected fracture toughness apparently. δIC was in linear relationship with X0(RV/RI)|R0 in the range of 8 μm～50 μm. R0 was 0.53 μm, X0 was 6.39μm for the tested steel, and the values of (RV/RI)|R0 were different for varied microstructures. The fracture toughness of AerMet100 steel was influenced by microstructures and inclusions greater than that of AF1410 steel.
AerMetl00 steel inclusion voids fracture toughness
LI Jie GUO Feng LI Zhi WANG Jun-li YAN Ming-gao
Beijing Institute of Aeronautical Materials, the Third Lab, Beijing 100095,China
国际会议
北京
英文
254-258
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）