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Fig. 6a shows a typical weld hardness profile of joint of DP600 side. The average hardness values of BM, HAZ and FZ are 195.5HV, 378.1HV and 381HV, respectively; Fig. 6b shows the hardness profile of joint of DP780 side, the average hardness values of BM, HAZ and FZ are 237HV, 345.2HV and 358.7HV, respectively.

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Fig. 6a and 6b show the typical weld hardness profiles of joint of DP600 (average hardness values of BM, HAZ and FZ are 195.5HV, 378.1HV and 381HV, respectively) and DP780 (average hardness values of BM, HAZ and FZ are 237HV, 345.2HV and 358.7HV, respectively) sides.

Fig 6 shows the typical weld hardness profiles of a) DP600 side (average hardness values of BM, HAZ and FZ are 195.5HV, 378.1HV and 381HV, respectively), and b) DP780 side (average hardness values of BM, HAZ and FZ are 237HV, 345.2HV and 358.7HV, respectively).
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