NiCoCrFeAlTiMoW合金长期时效过程中γ′相粗化对拉伸性能的影响
Effect of γ ′ phase coarsening on tensile properties during long-term aging of NiCoCrFeAlTiMoW alloy
查看参考文献20篇
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文摘
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采用真空电弧熔炼炉制备一种γ′相强化型NiCoCrFeAlTiMoW合金,利用X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)及拉伸试验机研究合金在750,850,950 ℃下,经200 h长期时效后γ ′相的粗化行为与力学性能的演变规律及机制。结果表明:随时效时间的延长,γ ′相在时效过程中始终为球形,γ ′相尺寸逐渐增大,且在750,850,950 ℃均发生凝并现象。合金具有较高的扩散激活能,其值为357 kJ/mol,这主要是由于基体为成分复杂的高熵固溶体,受迟滞扩散效应影响,Al,Ti原子在基体中的扩散变得困难。合金经750 ℃时效后屈服强度逐渐提高,经850 ℃时效后的屈服强度先升高后降低,经950 ℃时效后的屈服强度逐渐降低,合金屈服强度的改变是由γ ′相尺寸增加导致合金的沉淀强化机制发生转变所引起的。 |
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其他语种文摘
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A γ ′ phase strengthened NiCoCrFeAlTiMoW alloy was prepared in a vacuum arc melting furnace,and X-ray diffractometer (XRD),scanning electron microscope (SEM),energy dispersive spectrometer (EDS) and tensile testing machine were used to investigate the coarsening behavior and the evolution law and mechanism of mechanical properties of the γ ′ phase after 200 h long-term aging at 750, 850 ℃ and 950 ℃. The results show that γ ′ phase remains spherical during the aging process when the aging time is extended,γ ′ phase size gradually increases and the solidification phenomenon occurs at 750, 850 ℃ and 950 ℃. The alloy has a high diffusion activation energy with a value of 357 kJ/mol. This is mainly due to the fact that the matrix is a high entropy solid solution with complex composition,and the diffusion of Al and Ti atoms in the matrix becomes difficult due to the hysteresis diffusion effect. The yield strength of the alloy gradually increases after aging at 750 ℃,the yield strength after aging at 850 ℃ first increases and then decreases,and gradually decreases after aging at 950 ℃. The change in the yield strength of the alloy is caused by the increase in the size of the γ ′ phase,which leads to a shift in the precipitation strengthening mechanism of the alloy. |
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来源
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材料工程
,2024,52(2):172-179 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2023.000292
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关键词
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γ'相粗化
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高熵合金
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力学性能
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强化机制
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地址
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1.
沈阳航空航天大学材料科学与工程学院, 沈阳, 110136
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沈阳航空航天大学, 航空制造工艺数字化国防重点学科实验室, 沈阳, 110136
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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沈阳航空航天大学航空制造工艺数字化国防重点学科实验室开放基金资助项目
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沈阳航空航天大学大学生创新创业训练计划项目
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文献收藏号
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CSCD:7679709
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参考文献 共
20
共1页
|
|
1.
候介山. K44镍基高温合金长期时效过程中γ'相粗化对拉伸性能的影响.
金属学报,2006,42(5):481-486
|
CSCD被引
1
次
|
|
|
|
|
2.
马书伟. Re对γ′相粗化行为的影响.
航空材料学报,2000,20(3):11-14
|
CSCD被引
7
次
|
|
|
|
|
3.
师春伟. Ta含量对铸造高温合金DZ411长期热暴露过程中γ '相粗化的影响.
铸造,2023,72(1):1-6
|
CSCD被引
1
次
|
|
|
|
|
4.
王博. W对第三代镍基单晶高温合金组织稳定性的影响.
金属学报,2017,53(3):298-306
|
CSCD被引
10
次
|
|
|
|
|
5.
Acharya M V. The effect of long-term thermalexposures on the microstructure and properties of CMSX-10 singlecrystal Ni-base superalloys.
Materials Science and Engineering,2004,381(1/2):143-153
|
CSCD被引
58
次
|
|
|
|
|
6.
赵云松. Ru对第四代镍基单晶高温合金DD22长期时效组织演化的影响.
材料工程,2022,50(9):127-136
|
CSCD被引
5
次
|
|
|
|
|
7.
Booth-Morrison C. Effectsof tantalum on the temporal evolution of a model Ni-Al-Cr superalloy during phase decomposition.
Acta Materialia,2009,57(3):909-920
|
CSCD被引
11
次
|
|
|
|
|
8.
李红宇. GH742合金中γ'相粗化动力学研究.
材料工程,2007(8):8-11
|
CSCD被引
5
次
|
|
|
|
|
9.
Tsai K Y. Sluggish diffusion in Co-Cr-Fe-Mn-Ni high-entropy alloys.
Acta Materialia,2013,61(13):4887-4897
|
CSCD被引
165
次
|
|
|
|
|
10.
Chen S Y. On diffusion behaviors in facecentered cubic phase of Al-Co-Cr-Fe-Ni-Ti high-entropy superalloys.
Journal of Alloys and Compounds,2019,791:255-264
|
CSCD被引
2
次
|
|
|
|
|
11.
Baldan A. Review progress in Ostwald ripening theories andtheir applications to the γ'-precipitates in nickel-base superalloys:partⅠOstwald ripening theories.
Journal of Materials Science,2002,37(12):2379-2405
|
CSCD被引
41
次
|
|
|
|
|
12.
梁秀兵. 新型高温高熵合金材料研究进展.
科技导报,2021,39(11):96-108
|
CSCD被引
5
次
|
|
|
|
|
13.
Zhao Y Y. Thermal stability andcoarsening of coherent particles in a precipitation-hardened (NiCoFeCr)9 4Ti2Al4 high-entropy alloy.
Acta Materialia,2018,147:184-194
|
CSCD被引
24
次
|
|
|
|
|
14.
Feltham P. Solid solution hardening of metal crystals.
Journal of Physics D,1968,1(3):303
|
CSCD被引
1
次
|
|
|
|
|
15.
Gypen L A. Multi-component solid solution hardening.
Journal of Materials Science,1977,12:1034-1038
|
CSCD被引
39
次
|
|
|
|
|
16.
Roth H A. Modeling solid solution strengthening in nickel alloys.
Metallurgical and Materials Transactions A,1997,28(6):1329-1335
|
CSCD被引
20
次
|
|
|
|
|
17.
Reppich B. Some new aspects concerning particle hardening mechanisms in γ precipitating nickelbasealloys-Ⅱexperiments.
Acta Metallurgica,1982,30(1):95-104
|
CSCD被引
17
次
|
|
|
|
|
18.
Vittori M. On the antiphase boundary energyof Ni3(Al,Ti) particles.
Materials Science and Engineering,1985,74(1):29-37
|
CSCD被引
6
次
|
|
|
|
|
19.
Clausen B. Self-consistentmodelling of the plastic deformation of f. c. c. polycrystals and itsimplications for diffraction measurements of internal stresses.
Acta Materialia,1998,46(9):3087-3098
|
CSCD被引
21
次
|
|
|
|
|
20.
He J Y. Steady state flow of the FeCoNiCrMn high entropy alloy at elevated temperatures.
Intermetallics,2014,55:9-14
|
CSCD被引
32
次
|
|
|
|
|
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