CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Microstructure evolution and mechanical properties of simulated HAZ in a Ni-17Mo-7Cr superalloy: effects of the welding thermal cycles
Chen, SJ; Zhao, LB; Wang, JJ; Li, CW; Li, ZJ; Ye, XX; Tsang, DKL; Yu, K
2020
Source PublicationJOURNAL OF MATERIALS SCIENCE
ISSN0022-2461
Volume55Issue:27Pages:13372-13388
Subtype期刊论文
AbstractWelding thermal cycles with different peak temperatures were reproduced by a Gleeble testing machine to simulate the heat-affected zone of a Ni-17Mo-7Cr superalloy-welded joint. The effects of the thermal cycle times and peak temperatures on the microstructure and tensile properties of the thermal simulation specimens were systematically studied. The results show that no eutectic carbides are observed below 1300 degrees C, even when the number of thermal cycles is increased to 5. However, the eutectic reaction occurs above 1300 degrees C and causes a significant change in the carbide morphology because it transforms from a granular to lamellar structure. Moreover, the carbide composition transforms from (Ni, Cr)(3)Mo3C for the primary carbides to Ni-3(Mo, Cr)(3)C for the lamellar carbides after the eutectic reaction. Tensile tests show that the thermal cycle has a minor effect on the tensile properties, except when the specimen underwent 5 thermal cycles with a peak temperature of 1340 degrees C. This is mainly due to the severe liquation reaction caused by elevated temperatures from the welding heat source, which induces cracking along the grain boundaries and results in a degradation of the tensile properties.
KeywordRUPTURE PROPERTIES M6C CARBIDE HASTELLOY-N ALLOY GH3535 PRECIPITATION SEGREGATION TEMPERATURE CORROSION BEHAVIOR
DOI10.1007/s10853-020-04927-6
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33010
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Thorium Molten Salts Reactor Syst Ctr, Shanghai 201800, Peoples R China
2.Nucl & Radiat Safety Ctr, Beijing 102400, Peoples R China
3.Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Peoples R China
Recommended Citation
GB/T 7714
Chen, SJ,Zhao, LB,Wang, JJ,et al. Microstructure evolution and mechanical properties of simulated HAZ in a Ni-17Mo-7Cr superalloy: effects of the welding thermal cycles[J]. JOURNAL OF MATERIALS SCIENCE,2020,55(27):13372-13388.
APA Chen, SJ.,Zhao, LB.,Wang, JJ.,Li, CW.,Li, ZJ.,...&Yu, K.(2020).Microstructure evolution and mechanical properties of simulated HAZ in a Ni-17Mo-7Cr superalloy: effects of the welding thermal cycles.JOURNAL OF MATERIALS SCIENCE,55(27),13372-13388.
MLA Chen, SJ,et al."Microstructure evolution and mechanical properties of simulated HAZ in a Ni-17Mo-7Cr superalloy: effects of the welding thermal cycles".JOURNAL OF MATERIALS SCIENCE 55.27(2020):13372-13388.
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