日本機械学会論文集 A編
Online ISSN : 1884-8338
Print ISSN : 0387-5008
熱応力による単結晶材料のラフト組織
松下 政裕福山 佳孝藤沢 良昭陳 錦祥吉岡 洋明日野 武久
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2007 年 73 巻 728 号 p. 475-481

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Rafting of the nickel-base single crystal superalloy CMSX-2 was investigated under the condition of high thermal stress using a newly constructed experimental equipment. The test piece with the diameter of 25 mm was tested at the maximum material temperature of 1 000 degree Celsius for 80 hours. The results showed that the raft structure occurred only under the influence of thermal stress. The raft structure developed parallel to the direction of the compressive thermal stress because of negative lattice misfit. The thickness of gamma phase and gamma prime phase in rafting increase with the increase in the temperature and the thermal stress.

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