EFFECT OF CORROSION RESISTANCE COATING ON FATIGUE-CREEP INTERACTION LIVES OF NI BASED SUPERALLOY RENE80
EFFECT OF CORROSION RESISTANCE COATING ON FATIGUE-CREEP INTERACTION LIVES OF NI BASED SUPERALLOY RENE80
复制标题
耐腐蚀涂层对镍基高温合金REN80疲劳-蠕变相互作用寿命的影响
DOI：
10.2472/jsms.40.165
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Y. Kojima
中科院分区：
文献类型：
--
作者：
N. Matsuda;S. Umezawa;Y. Kojima
本文研究了两种耐蚀涂层CoNiCrAlY和Al化学气相沉积（CVD）涂层对铸造镍基高温合金Rene 80疲劳-蠕变交互作用寿命的影响。在疲劳条件下，CoNiCrAIY涂层提高了表面裂纹萌生的阻力，而AICVD涂层减少了表面裂纹萌生的循环次数。然而，涂层和非涂层试样的表面裂纹扩展速率是大约相同的值。结果表明，涂层试样的疲劳寿命受试样表面氧化程度和涂层材料性能的影响。疲劳蠕变交互作用下的寿命是由基体金属Rene 80的失效机制（沿晶开裂），而不是氧化和涂层材料的性能。
This paper deals with the effects of two types of corrosion resistance coatings, CoNiCrAIY and Al chemical vapour deposition (CVD) coating, on the fatigue-creep interaction life of a cast Ni base superalloy Rene80. Under a fatigue condition, CoNiCrAIY coating improved the resistance to surface crack initiation, while AICVD coatings reduced the number of cycles to surface crack initiation. However, the surface crack propagation rates of both the coated and non-coated specimens were about the same value. It was found that the fatigue life of the coated specimens was affected by the oxidation of the specimen surface and the properties of the coating material. The life under fatigue creep interaction was affected by the failure mechanism (intergranular cracking) of the base metal Rene80 rather than the oxidation and properties of the coating material.