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Discontinuous Dynamic Recrystallization of Inconel 718 Superalloy During the Superplastic Deformation
Huang, Linjie; Qi, Feng; Hua, Peitao; Yu, Lianxu; Liu, Feng; Sun, Wenru; Hu, Zhuangqi; wrsun@imr.ac.cn
2015
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume46AIssue:9Pages:4276-4285
AbstractThe superplastic behavior of Inconel 718 superalloy with particular emphasis on the microstructural evolution has been systematically investigated through tensile tests at the strain rate of 10(-3) s(-1) and the temperatures ranging from 1223 K to 1253 K (950 A degrees C to 980 A degrees C). Its elongations exceeded 300 pct under all of the experimental conditions and peaked a maximum value of 520 pct at 1223 K (950 A degrees C). Moreover, the stress reached the top value at the strain of 0.3, and then declined until the tensile failure. In addition, we have found that the grain size reduced after deformation while the delta phase precipitation increased. Microstructural evolution during the superplasticity was characterized via transmission electron microscope, and the randomly distributed dislocation, dislocation network, dislocation arrays, low-angled subgrains, and high-angled recrystallized new grains were observed in sequence. These new grains were found to nucleate at the triple junction, twin boundary, and near the delta phase. Based on these results, it is deemed that the discontinuous dynamic recrystallization occurred as the main mechanism for the superplastic deformation of Inconel 718 alloy.
description.department[huang, linjie ; qi, feng ; hua, peitao ; yu, lianxu ; liu, feng ; sun, wenru ; hu, zhuangqi] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74725
Collection中国科学院金属研究所
Corresponding Authorwrsun@imr.ac.cn
Recommended Citation
GB/T 7714
Huang, Linjie,Qi, Feng,Hua, Peitao,et al. Discontinuous Dynamic Recrystallization of Inconel 718 Superalloy During the Superplastic Deformation[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2015,46A(9):4276-4285.
APA Huang, Linjie.,Qi, Feng.,Hua, Peitao.,Yu, Lianxu.,Liu, Feng.,...&wrsun@imr.ac.cn.(2015).Discontinuous Dynamic Recrystallization of Inconel 718 Superalloy During the Superplastic Deformation.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,46A(9),4276-4285.
MLA Huang, Linjie,et al."Discontinuous Dynamic Recrystallization of Inconel 718 Superalloy During the Superplastic Deformation".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 46A.9(2015):4276-4285.
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