高温合金循环蠕变实验

本文利用装配有EDC数字控制器的高温电子蠕变试验机开展了一种镍基高温合金的循环蠕变实验。结果表明与恒载荷静态蠕变相比,两种方式(矩形波和锯齿波)载荷循环降低了合金蠕变寿命,但对蠕变塑性并没有影响。

眉山：环境监督员集中培训—个月

10月13日起。眉山城区380余名环境监督员，连同50余名街道、社区负责人，开始了为期一个月的环境综合治理社区监督员培训，重点学习《四川省城乡环境综合治理条例》。

Creep behavior of ageing hardened Mg-10Gd-3Y alloy

Tensile creep behaviors of the ageing hardened Mg-10Gd-3Y alloy(referred to GW103)were investigated at temperatures up to 300℃.The extruded-T5 specimen exhibited high creep resistance,i.e.the low steady-state creep rate and long creep rupture time,while the better creep properties were observed in the cast-T6 one.The low steady-state creep rate of 1.71×10- 9s -1is obtained at 200℃and 80 MPa for the extruded-T5 GW103 alloy.In addition,the microstructure development of GW103-T5 alloy was also examined after creep exposure at different temperatures.On the other hand,the stress exponent and activation energy were studied in the temperature range of 200-300℃for the extruded-T5 specimens,and the creep mechanism was also discussed.

镍基高温合金Nimonic C263的蠕变曲线特征

研究了Nimonic C263合金在不同温度和应力条件下的恒载荷蠕变行为。结果表明,合金蠕变曲线在很短减速蠕变阶段后,既可表现出稳态蠕变阶段,最小蠕变速率,也可表现出加速蠕变阶段,取决于组织的不同变化。讨论了合金的蠕变变形与断裂机制。