0
Research Papers: Materials and Fabrication

Research on the High-Temperature Hot Compressive Deformation Behavior of Ni-Based Superalloy GH3128

[+] Author and Article Information
Xi Zhao

Institute of Nuclear and New Energy Technology,
Collaborative Innovation Center of
Advanced Nuclear Energy Technology,
Key Laboratory of Advanced Reactor Engineering
and Safety of Ministry of Education,
Tsinghua University,
Room A201, Energy Science Building,
Beijing 100084, China
e-mail: zhaoxithu@163.com

Kun Yuan

Institute of Nuclear and New Energy Technology,
Collaborative Innovation Center of
Advanced Nuclear Energy Technology,
Key Laboratory of Advanced Reactor Engineering
and Safety of Ministry of Education,
Tsinghua University,
Room C103, Energy Science Building,
Beijing 100084, China
e-mail: kyuan@tsinghua.edu.cn

Yu Zhou

Institute of Nuclear and New Energy Technology,
Collaborative Innovation Center of
Advanced Nuclear Energy Technology,
Key Laboratory of Advanced Reactor Engineering
and Safety of Ministry of Education,
Tsinghua University,
Room 1210, Huaye Building,
Beijing 100084, China
e-mail: yuzhou@tsinghua.edu.cn

Fu Li

Institute of Nuclear and New Energy Technology,
Collaborative Innovation Center of
Advanced Nuclear Energy Technology,
Key Laboratory of Advanced Reactor Engineering
and Safety of Ministry of Education,
Tsinghua University,
Energy Science Building,
Beijing 100084, China
e-mail: lifu@tsinghua.edu.cn

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received February 23, 2016; final manuscript received July 3, 2016; published online September 27, 2016. Assoc. Editor: Haofeng Chen.

J. Pressure Vessel Technol 139(2), 021401 (Sep 27, 2016) (8 pages) Paper No: PVT-16-1027; doi: 10.1115/1.4034147 History: Received February 23, 2016; Revised July 03, 2016

Intermediate heat exchanger (IHX), which transfers the heat generated in the reactor core to the secondary loop, is one of the key structural components of the very high-temperature gas-cooled reactor (VHTR). The Ni-based superalloy GH3128 has good high-temperature strength and so is a promising main structural material for the IHX. In this paper, the flow stress behaviors and the deformation microstructure of superalloy GH3128 were investigated by high-temperature compression tests conducted at various temperatures (950–1150 °C) and strain rates (0.001–10 s−1), and the processing maps were analyzed in order to establish the hot deformation constitutive model and obtain the optimum hot forming condition. The results show that (1) both flow stresses and peak flow stresses increase along with the increase of strain rate or decrease of temperature, (2) GH3128 has excellent hot workability, (3) the dynamic recovery (DRV) plays the dominant role during the dynamic softening process due to the high stack fault energy, and (4) the optimum hot forming condition of GH3128 should be defined in the temperature of 1150 °C and strain rate range of 0.01–0.056 s−1. This work contributes to the application of GH3128 alloy on IHX structure.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Kim, W. G. , Yin, N. S. , Kim, Y. W. , and Ryu, W. S. , 2010, “ Creep Behaviour and Long-Term Creep Life Extrapolation of Alloy 617 for a Very High Temperature Gas-Cooled Reactor,” Trans. Indian Inst. Met., 63(2–3), pp. 145–150. [CrossRef]
Tragsdorf, I. M. , Jansing, W. , Weisbrodt, I. , Poppe, N. , and Kugeler, K. , 2006, “ The High Temperature Helium Test Facility, KVK,” Institute of Reactor Safety and Reactor Technology, RWTH, Aachen, Germany.
Shimizu, A. , Matsumura, N. , Nishikawa, H. , and Yamada, S. , 1984, “ Recent Research and Development of Intermediate Heat Exchanger for VHTR Plant,” Specialists' Meeting on Heat Exchanging Components of Gas-Cooled Reactor, Duesseldorf, Germany, Apr. 16–19, pp. 82–93.
Penfield, S. R. , Jr., 2008, “ NGNP and Hydrogen Production Pre-Conceptual Design Study: IHX and Heat Transport System,” Westinghouse Electric Corporation, Pittsburgh, PA, NGNP-HTS 60-IHX, Revision 0.
Shi, Y. , Yuan, K. , Zhao, X. , and Wu, Y. , 2013, “ Study on Comparison Between Inconel 617 and GH3128 as Structural Material Candidates for Intermediate Heat Exchanger,” ASME Paper No. ICONE21-15948.
Zhao, X. , 2014, “ Preliminary Research on the Structural Material for Intermediate Heat Exchanger of High-Temperature Gas-Cooled Reactor,” Master's thesis, Tsinghua University, Beijing, China (in Chinese).
Central Iron & Steel Research Institute, 1973, “ GH128 Ni-Based Superalloy,” Central Iron & Steel Research Institute, Beijing, China (in Chinese).
Jonas, J. J. , Sellars, C. M. , and McTegart, W. J. , 1969, “ Strength and Structure Under Hot-Working Conditions,” Metall. Rev., 14(1), pp. 1–24. [CrossRef]
Sellars, C. M. , and McTegart, W. J. , 1966, “ On the Mechanism of Hot Deformation,” Acta Metall., 14(9), pp. 1136–1138. [CrossRef]
Lin, Y. C. , Wen, D. X. , Deng, J. , Liu, G. , and Chen, J. , 2014, “ Constitutive Models for High-Temperature Flow Behaviors of a Ni-Based Superalloy,” Mater. Des., 59, pp. 115–123. [CrossRef]
Shi, C. , Mao, W. , and Chen, X. G. , 2013, “ Evolution of Activation Energy During Hot Deformation of AA7150 Aluminum Alloy,” Mater. Sci. Eng.: A, 571, pp. 83–91. [CrossRef]
Rajamuthamilselvan, M. , and Ramanathan, S. , 2011, “ Hot Deformation Behaviour of 7075 Alloy,” J. Alloys Compd., 509(3), pp. 948–952. [CrossRef]
Liu, Y. , Ning, Y. , Nan, Y. , Liang, H. , Li, Y. , and Zhao, Z. , 2015, “ Characterization of Hot Deformation Behavior and Processing Map of FGH4096–GH4133B Dual Alloys,” J. Alloys Compd., 633, pp. 505–515. [CrossRef]
Chen, G. , 1988, Superalloy Science, Metallurgical Industry Press, Beijing, China.
Medina, S. F. , and Hernandez, C. A. , 1996, “ General Expression of the Zener–Hollomon Parameter as a Function of the Chemical Composition of Low Alloy and Microalloyed Steels,” Acta Mater., 44(1), pp. 137–148. [CrossRef]
Prasad, Y. V. R. K. , Gegel, H. L. , Doraivelu, S. M. , Malas, J. C. , Morgan, J. T. , Lark, K. A. , and Barker, D. R. , 1984, “ Modeling of Dynamic Material Behavior in Hot Deformation: Forging of Ti-6242,” Metall. Trans. A, 15(10), pp. 1883–1892. [CrossRef]
Prasad, Y. V. R. K. , and Seshacharyulu, T. , 1998, “ Processing Maps for Hot Working of Titanium Alloys,” Mater. Sci. Eng.: A, 243, pp. 82–88. [CrossRef]
Medeiros, S. C. , Prasad, Y. V. R. K. , Frazier, W. G. , and Srinivasan, R. , 2000, “ Microstructural Modeling of Metadynamic Recrystallization in Hot Working of IN 718 Superalloy,” Mater. Sci. Eng.: A, 293, pp. 198–207. [CrossRef]
Cai, D. , Xiong, L. , Liu, W. , Sun, G. , and Yao, M. , 2007, “ Development of Processing Maps for a Ni-Based Superalloy,” Mater. Charact., 58(10), pp. 941–946. [CrossRef]
Guo, Y. , Hou, S. F. , and Zhou, R. C. , 2010, “ Effect of Grain-Boundary M23C6 Carbides on Mechanical Properties of Inconel Alloy 617,” J. Chin. Soc. Power Eng., 30(10), pp. 804–808 (in Chinese).

Figures

Grahic Jump Location
Fig. 1

Optical microstructure of GH3128 bar before hot deformation: (a) 50× and (b) 200×

Grahic Jump Location
Fig. 2

True stress–strain curves of alloy GH3128 under hot compression at various temperatures and strain rates: (a) ε˙=0.001 s−1, (b)  ε˙=0.01 s−1, (c)  ε˙=0.1 s−1, (d)  ε˙=1 s−1, and (e)  ε˙=10 s−1

Grahic Jump Location
Fig. 3

Effect of temperature (a) 950 °C, (b) 1000 °C, (c) 1050 °C, (d) 1100 °C, and (e) 1150 °C on microstructures of GH3128 deformed at strain rate of 0.01 s−1 (500×)

Grahic Jump Location
Fig. 4

Effect of strain rate (a) 0.001 s−1, (b) 0.01 s−1, (c) 0.1 s−1, (d) 1 s−1, and (e) 10 s−1 on microstructures of GH3128 deformed under temperature of 1100 °C (500×)

Grahic Jump Location
Fig. 5

Relationships between different deformation parameters of GH3128

Grahic Jump Location
Fig. 6

Cubic spline fit of log σ – log ε˙ at different strains: (a) 0.2, (b) 0.4, and (c) 0.6

Grahic Jump Location
Fig. 7

Power dissipation maps of GH3128 at different strains: (a) 0.2, (b) 0.4, and (c) 0.6

Grahic Jump Location
Fig. 8

Processing maps of GH3128 at different strains: (a) 0.2, (b) 0.4, and (c) 0.6

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In