γ＇相的形貌对Ni-Co基高温合金Portevin-Le Chatelier效应的影响

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	γ＇相的形貌对Ni-Co基高温合金Portevin-Le Chatelier效应的影响
其他题名	Influence of the γ＇-phase Morphology on Portevin-Le Chatelier Effect in a Ni-Co Base Superalloy
	张国梁(); 王新广(); 王道红(); 李志海(); 严红彬(); 崔传勇()
	2018
发表期刊	材料研究学报
ISSN	1005-3093
卷号	32.0 期号:009 页码:647-654
摘要	通过不同的热处理工艺制备含花状、球状、立方状γ＇相的Ni-Co基变形高温合金,研究了γ＇相的形貌对其PLC效应的影响。结果表明：合金的PLC效应与γ＇相的形貌有关。球状形貌的g＇相使合金的应力跌幅较大,花状和立方状形貌的γ＇相使合金更快完成从正常PLC到反常PLC的转变。合金在中低温（400℃、500℃）拉伸时位错易塞积在复杂形貌（花状和立方）的g＇相周围,合金的变形机制以形成层错或微孪晶为主;而在球状形貌γ＇相的周围位错塞积较少,合金的变形机制则以位错滑移为主。
其他摘要	A Ni-Co based alloy with γ＇-phase of various morphologies was prepared by different heat treatment processes. Then the influence of the γ＇-phase on the Portevin-Le Chatelier（PLC） effect was investigated systematically. Results show that the PLC effect is related to the morphology of the γ＇-phase. During tensile test the alloy shows large stress drop while the spherical-shaped γ＇-phase existed. The γ＇-phase with flowery and cubic morphology would accelerate the transformation from normal PLC to inverse PLC. When the alloy was tensile tested in medium-low temperatures（400, 500° C）the dislocations would pile up around the g＇-phase with flowery and cubic morphology, and the deformation mechanism of the alloy may be described mainly to stacking fault or deformation twin. While less dislocation piled up around the spherical-shaped γ＇-phase, therefore, the deformation of the alloy is mainly controlled by the dislocation slip.
关键词	金属材料 PLC效应 γ＇相形貌 Ni-Co基变形高温合金
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6341412
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/151392
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.江苏飞跃机泵集团有限公司
推荐引用方式 GB/T 7714	张国梁(),王新广(),王道红(),等. γ＇相的形貌对Ni-Co基高温合金Portevin-Le Chatelier效应的影响[J]. 材料研究学报,2018,32.0(009):647-654.
APA	张国梁,王新广,王道红,李志海,严红彬,&崔传勇.(2018).γ＇相的形貌对Ni-Co基高温合金Portevin-Le Chatelier效应的影响.材料研究学报,32.0(009),647-654.
MLA	张国梁,et al."γ＇相的形貌对Ni-Co基高温合金Portevin-Le Chatelier效应的影响".材料研究学报 32.0.009(2018):647-654.