Microstructure and fracture toughness of electron beam welded joints of 30CrMnSiNi2A steel

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Two post-weld heat-treatments (PWHT), 900℃ oil quenched and low temperature tempered (PWHTA) and high temperature tempered and then 900℃ oil quenched and low temperature tempered (PWHTB), are employed to treat the weldment. Then the effect of two post-wel
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