10 Notchedbar impact test results were obtained on a heat of steel as follows Energy absorbed, Temperature, Energy absorbed, Temperature, J (ftlbf) C ( F) J (ftlbf) C ( F) 171, 161, 151 (126, 119, 111) 93 (200) 61, 60, 38 (45, 44, 28) 4 (40) 168, 159 (124, 117) 82 (180) 43, 27, 27 (32, 20, 20) 12 (10) 160, 153, 152 (118, 113, 112) 71 (160) 33, 23, 16 (24, 17, 12) 18 (0) 155, 153, 146 (114, 113, 108) 60 (140) 22, 14, 10 (16, 10, 7) 29 (20) 156, 152, 146, 141 (115, 112, 108, 104) 49 (120) 15, 12, 8 (11, 9, 6) 40 (40) 146, 126, 121, 106 (108, 93, 89, 78) 38 (100) 15, 12, 12 (11, 9, 9) 51 (60) 110, 81, 69 (81, 60, 51) 21 (70) 20, 11, 10 (15, 8, 7) 62 (80) Plot the results and determine the approximate critical temperature range over which the steel changes from ductile to brittle For what purpose can the notchedbar impact test be used
