| 史振学,骆宇时,刘世忠.涂层扩散热处理工艺对DD6单晶高温合金组织和力学性能的影响[J].有色金属材料与工程,2019,40(2):25-30. |
| 涂层扩散热处理工艺对DD6单晶高温合金组织和力学性能的影响 |
| Effect of Coating Diffusion Heat Treatment Process on Microstructure and Mechanical Property of the DD6 Single Crystal Superalloy |
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| DOI：10.13258/j.cnki.nmme.2019.02.005 |
| 中文关键词: 单晶高温合金 扩散热处理工艺 组织 力学性能 |
| 英文关键词:single crystal superalloy diffusion heat treatment process microstructure mechanical property |
| 基金项目: |
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| 摘要点击次数: 2234 |
| 全文下载次数: 1932 |
| 中文摘要: |
| 研究了870℃/6 h涂层扩散热处理工艺对第二代镍基DD6单晶高温合金(简称DD6合金)组织和性能的影响。研究结果表明,采用870℃/6 h涂层扩散热处理工艺处理后,DD6合金的显微组织、760℃拉伸性能、980℃/250 MPa持久性能、700℃高周疲劳性能无明显变化。DD6合金760℃拉伸断裂类型为准解理断裂,980℃/250 MPa持久断裂类型为韧窝断裂,700℃高周疲劳断裂类型为准解理断裂。涂层扩散处理没有改变DD6合金的断裂机制。 |
| 英文摘要: |
| The effect of coating diffusion heat treatment process of 870℃/6 h on microstructure and mechanical property of a second generation nickel-based DD6 single crystal superalloy (DD6 alloy for short) has been investigated. The results indicates that the DD6 alloy shows no obvious change on the microstructure, tensile properties at 760℃, stress rupture properties at 980℃/250 MPa and high cycle fatigue (HCF) properties at 700℃ after the coating diffusion heat treatment of 870℃/6 h. The tensile fracture mechanism of the alloy at 760℃ is quasi-cleavage fracture. The stress rupture mechanism at 980℃/250 MPa is dimple mode. The HCF fracture mechanism at 700℃ is quasi-cleavage fracture. The fracture mechanisms of the DD6 alloy aren't changed by coating diffusion treatment. |
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