Design and mechanical characterization of a Zr-Nb-O-P alloy

作者：Lee Jong Min; Hong Sun Ig^*

来源：Materials & Design, 2011, 32(8-9): 4270-4277.

DOI：10.1016/j.matdes.2011.04.015

• Non-ferrous metals and alloys
• Casting
• Mechanical

In this study, Sn-free Zr-1.5Nb-O-P alloys were manufactured and their mechanical properties were characterized. The ultimate tensile strength (UTS) of cold rolled Zr-1.5Nb-O-P alloy with 160 ppm phosphorous (680 MPa) were close to that of a commercially available Zr-1Nb-1Sn-0.1Fe alloy (720 MPa), achieving a good mechanical strength without the addition of Sn, an effective solution strengthening element. The UTS of recrystallized Zr-1.5Nb-O-P alloy with 160 ppm phosphorous (533 MPa) was far greater than that of a commercially available Zr-1Nb-O (323 MPa) because of the strengthening due to higher Nb and oxygen content combined with phosphorous strengthening. The activation volumes for the cold rolled Zr-1.5Nb-P alloys were not much different from those of annealed Zr-1.5Nb-P alloys despite the higher dislocation density in the cold rolled alloys. Insensitivity of the activation volume to the dislocation density and the decrease of the activation volume with the addition of phosphorous support the suggestion linking the activation volume with the activated bulge of dislocations limited by segregation of oxygen and phosphorous atoms.

• 出版日期2011-9