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| NiAl-28Cr-5.5Mo-0.5Hf-0.012P合金的蠕变性能研究 | |
| 引用本文： | 张光业,张华,伍先明,郭建亭.NiAl-28Cr-5.5Mo-0.5Hf-0.012P合金的蠕变性能研究[J].稀有金属,2006,30(3):305-309. |
| 作者姓名： | 张光业 张华 伍先明 郭建亭 |
| 作者单位： | 1. 湖南科技大学机电工程学院,湖南,湘潭,41120;中国科学院金属研究所,辽宁,沈阳,110016 2. 湖南科技大学机电工程学院,湖南,湘潭,411201 3. 中国科学院金属研究所,辽宁,沈阳,110016 |
| 基金项目： | 中国科学院资助项目;国家科技攻关项目 |
| 摘 要： | 研究了热等静压态NiAl-28Cr-5．5Mo-0.5Hf-0．012P合金的高温蠕变行为。结果表明：实验合金具有较短的减速蠕变阶段和相当长的稳态蠕变阶段以及很高的蠕变应变；在研究的实验条件范围内，合金的蠕变变形机制为低温高应力下的位错粘滞滑移控制和高温低应力下的位错攀移控制；蠕变后合金的显微组织变化不大，表明蠕变断裂受孔洞及裂纹的形成和扩展所控制，而且蠕变断裂行为符合修正后的Monkman-Grant规律：Intf＋0.775lnε=1.104。 |
| 关 键 词： | 金属间化合物 NiAl基合金 蠕变 |
| 文章编号： | 0258-7076（2006）03-0305-05 |
| 收稿时间： | 2005-08-16 |
| 修稿时间： | 2005-08-162005-09-30 |
Creep Behavior for NiAl-28Cr-5.5Mo-0.5Hf-0.012P Alloy at High Temperature |
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| Zhang Guangye,Zhang Hua,Wu Xianming,Guo Jianting.Creep Behavior for NiAl-28Cr-5.5Mo-0.5Hf-0.012P Alloy at High Temperature[J].Chinese Journal of Rare Metals,2006,30(3):305-309. | |
| Authors: | Zhang Guangye Zhang Hua Wu Xianming Guo Jianting |
| Affiliation: | 1.School of Electromechanism Engineering, Hunan University of Science and Technology, Xiangtan 411201 China ; 2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| Abstract: | The Microstructure and creep behavior for NiAl-28Cr-5.5Mo-0.5Hf-0.012P alloy at high temperature were investigated.The results reveal that the high temperature creep behavior of NiAl-28Cr-5.5Mo-0.5Hf-0.012P alloy is characterized by transient primary creep and dominant steady-state creep as well as high creep strain.The creep mechanisms are dislocation glide at lower testing temperatures in higher stress levels and dislocation climb at higher temperatures in lower stress levels.The microstructure has no change,indicating that the creep fracture is controlled by the formation and propagation of cavities and cracks.The creep fracture behavior obeys Monkman-Grant relationship: lnt_f+0.775ln=1.104. |
| Keywords: | intermetallics NiAl-based alloy creep |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |