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13.
Microstructure, yield stress and hardness in weld heat-affected zone of 9-12% Cr steels
Kafexhiu, Fevzi ; Vodopivec, Franc ; Vojvodič-Tuma, Jelena
The effect of welding and tempering on microstructure and room temperature mechanical properties of two types of creep-resistant steels, X20CrMoV121 and P91, was investigated. Samples were welded and ...then tempered for 17 520 h at 650 [compositum]C and 8 760 h at 750 [compositum]C. After tempering, the room-temperature yield stress and hardness of two regions of weld heat-affected zone (HAZ) were determined. In addition, the scanning electron microscopy (SEM) imaging was carried out. It was found that the effect of tempering at 750 [compositum]C on the microstructure, room-temperature yield stress and hardness was greater than the effect of tempering at 650 [compositum]C. It was also found that weakest part of the HAZ for both tempering temperatures, with regard to the yield stress and hardness, was the coarse grained [gamma] microstructure.
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zato vas vljudno prosimo, da nas glede knjižničnega gradiva predhodno kontaktirate na e-mail:
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