DEFORMATION BEHAVIORS OF THERMO-MECHANICALLY PROCESSED Zr-Nb-P ALLOYS
Deformation behaviors of Zr-1.5 wt. ％ Nb alloys with no phosphorus addition and with various phosphorous contents (20 ppm, 160 ppm) were investigated in this study. The flow stress of Zr-1.5 Nb increased with the addition of 20～160 ppm phosphorous over a temperature range from room temperature to 450C. The dislocation density appeared to increase with increase of phosphorous content. The increase of strength with phosphorous addition may be linked to the increase of dislocation density. The increase of dislocation density with a higher phosphorous content can be associated with the increase of statistically stored dislocation due to a lower recovery rate. The activation volume decreased from 650-750 b3 to 450-550 b3 with the addition of 160 ppm phosphorous at room temperature. The rate-controlling mechanism of the deformation of Zr-Nb-P alloy is thought to be the dislocation-solute interaction in which the segregation of alloying elements such as oxygen and phosphorous atoms affects the activation length of dislocations.
Phosphorous Zr-Nb solution strengthening dislocation activation volume
SAN KO SUN IG HONG
Department of Advanced Materials Engineering, Chungnam National University, Daejeon, Korea
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1816-1821
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）