Table 5 Average impact toughness of cutter ring material.

From: Design and performance evaluation of a novel cutter-ring material based on TBM rock-breaking mechanisms

Material number

Hardness/HRC

Impact toughness(AKU2/J)

S13A

57.4

21.26

S13B

57.2

15.8

S13C

56.7

13.24

S13D

57.85

20.5

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