Fig. 10From: Effect of real-time high temperature and loading rate on mode I fracture toughness of graniteSEM images of granite at 25–500 ℃ and 0.01 mm/min loading rate (The red lines indicate the intergranular cracks, the yellow lines indicate the transgranular cracks, and the red circles indicate the broken area.). a 25 ℃. b 100 ℃. c 200 ℃. d 300 ℃. e 400 ℃. f 500 ℃Back to article page