EFFECT OF STRAIN RATE ON TENSILE PROPERTIES AND DYNAMIC STRAIN AGING PHENOMENON OF Zr-Sn-Nb (N18) ALLOY AT ELEVATED TEMPERATURES
To investigate effect of strain rate on tensile properties and stress relaxation effect of Zr-Sn-Nb (N18) alloy,a series of uniaxial tests were completed in the temperature range from 20℃ to 700℃.The results show that,the tensile properties including elastic modulus,yield stress,tensile strength,percentage elongation and percentage reduction of area are greatly affected by the temperature.Except for the elastic modulus,the direction of material and strain rate also have influence on the other tensile properties.This alloy presents dynamic strain aging obviously in the temperature range from 300℃ to 450℃.In this temperature range,with increasing temperature,the percentage elongation and strain rate sensitivity appears a sudden drop and obtain the minimum value,the work-hardening rate presents a peak value,and yield stress decreases less.
N18 alloy tensile property dynamic strain aging strain rate sensitivity stress relaxation
C.Bao L.X.Cai J.Tan Q.Jia
Department of Applied Mechanics and Engineering,Southwest Jiaotong University,Chendu,Sichuan 610031, National Key Laboratory for Nuclear Fuel and Material,Nuclear Power Institute of China,Chengdu,Sichu
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
451-455
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）