PSI - Issue 60

9

Author name / Structural Integrity Procedia 00 (2019) 000 – 000

B Shashank Dutt et al. / Procedia Structural Integrity 60 (2024) 471–483

479

Table 4: Estimated K 1c results of SS 316 LN welds tested at 380 °C

Aging temperature (°C) and durations (h)

Estimated Modulus of toughness MJ.m -3

Estimated K 1c ( MPa. m 0.5 )

Determined K j1c ( MPa. m 0.5 )

Percentage difference (%)

As welded

160

252

253

1

Aged at 370, 1000 h Aged at 370, 10,000 h Aged at 370, 20,000 h Aged at 475, 1000 h Aged at 475, 10,000 h

98

197

220

10

153

246

244

1

114

212

169

25

54

147

204

28

66

162

226

29

Aged at 475, 20,000 h

58

151

209

28

Aged at 550, 1000 h

50

141

222

37

Aged at 550, 10,000 h

53

145

222

35

Aged at 550, 20,000 h

47

136

205

33