氢氧推力室内壁用铜合金疲劳及蠕变性能研究  

Experimental Study on Fatigue and Creep Properties of LOX/LH2 Thrust Chamber Copper Alloy Liner Wall

作　　者：丁兆波[1] 王珏[2] Ding Zhaobo;Wang Jue(Beijing Aerospace Propulsion Institute,Beijing 100076;China Academy of Launch Vehicle Technology,Beijing 100076)

机构地区：[1]北京航天动力研究所,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《航天制造技术》2021年第5期30-34,39,共6页Aerospace Manufacturing Technology

摘　　要：为了获得氢氧推力室内壁用锆铜CuZr0.15和银锆铜CuAg3Zr0.5的低周疲劳特性、蠕变特性和冷热疲劳特性,对比试验研究了在不同温度和应力应变水平下的两种材料。试验结果表明,银锆铜在相同的控制应力条件下比锆铜具有更长的疲劳寿命;而在相同的控制应变条件下,锆铜的疲劳寿命高于银锆铜;在相同应力条件下,银锆铜的蠕变总应变和残余应变均高于锆铜,其抗蠕变损伤性能稍逊于CuZr0.15;在同等热震试验条件下,两种合金的抗拉强度均随热震次数的增加出现小幅下降。相关研究结果可为分析推力室内壁裂纹失效机理,预估推力室内壁的使用寿命,优化冷却通道设计提供依据。To obtain the low cycle fatigue,high temperature creep and cold-hot fatigue properties of CuZr0.15 and CuAg3Zr0.5 used in LOX/LH2 thrust chamber,comparative experiments under different temperature and stress-strain level have been studied.The experiments results reveal that CuAg3Zr0.5 has a better fatigue life than CuZr0.15 with the same control stress,while the contrary results could be observed with the same control strain.Meanwhile,CuAg3Zr0.5 has a higher total strain and residual strain than CuZr0.15 with the same control stress,so the latter has the better ability of resistance to creep than the former.The tensile strength of two copper alloy will slightly decrease with the number of thermal shock tests increased at the same experimental conditions.The results can provide a useful direction for the failure mechanism analysis,the life-prediction,and the optimization of thrust chamber liner wall.

关 键 词：氢氧推力室 铜合金内壁 低周疲劳 高温蠕变 热震试验 

分 类 号：V45[一般工业技术—材料科学与工程]