Abstract
A stress relaxation test has been carried out for Hastelloy C-276 at temperature of 800 °C and initial stress level of 250 MPa. Based on the experimental stress relaxation curve, the relationship between creep strain rate and stress has been derived. Then, a set of creep constitutive equations has been built and the values of constants arising in the constitutive equations have been determined by fitting the creep strain rate-stress curve. Close agreement between computed results and experimental ones is obtained for stress relaxation data. The creep constitutive equation set has been integrated with the commercial FE (finite element) solver MSC. Marc via the user defined subroutine, CRPLAW, for the vacuum hot bulge forming process modelling of Hastelloy C-276 thin-walled cylindrical workpiece. The temperature field, the radius-direction displacement field and the stress-strain field are calculated and analyzed. Furthermore, the bulging dimension and the final internal diameter of workpiece are predicted and the test results verify the reliability of the finite element method.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
AHMAD M, AKHTER J I, AKHTAR M, IQBAL M, AHMED E, CHOUDHRY M A. Microstructure and hardness studies of the electron beam welded zone of Hastelloy C-276 [J]. Journal of Alloys and Compounds, 2005, 390(1/2):88–93.
GUAN Rui, GAO Yong-jun. Brief analysis on fabrication process of AP1000 reactor coolant pump can [J]. China Nuclear Power, 2008, 1(1):49–53. (in Chinese)
IDEM K, PEDDIESON J. Simulation of the age forming process [J]. Journal of Manufacturing Science and Engineering, 2005, 127(2):165–172.
WANG Ming-wei, ZHANG Li-wen, PEI Ji-bin, LI Chen-hui, ZHANG Fan-yun. Effect of temperature on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece [J]. Transactions of Nonferrous Metals Society of China, 2007, 17:957–962.
HO K C, LIN J, DEAN T A. Constitutive modelling of primary creep for age forming an aluminium alloy [J]. Journal of Materials Processing Technology, 2004, 153–154:122–127.
JEUNECHAMPS P -P, HO K C, LIN J, PONTHOT J -P, DEAN T A. A closed form technique to predict springback in creep age-forming [J]. International Journal of Mechanical Sciences, 2006, 48:621–629.
ZHAN L H, LIN J G, DEAN T A, HUANG M H. Experimental studies and constitutive modelling of the hardening of aluminium alloy 7055 under creep age forming conditions [J]. International Journal of Mechanical Sciences, 2011, 53:595–605.
LI Chao, WAN Min, WU Xiang-dong, HUANG Lin. Constitutive equations in creep of 7B04 aluminum alloys [J]. Materials Science and Engineering A, 2010, 527:3623–3629.
JESHVAGHANI R A, EMAMI M, SHAHVERDI H R, HADAVI S M M. Effects of time and temperature on the creep forming of 7075 aluminum alloy: Springback and mechanical properties [J]. Materials Science and Engineering A, 2011, 528:8795–8799.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(2009CB724307) supported by the Major State Basic Research Development Program (973 Program) of China
Rights and permissions
About this article
Cite this article
Zhu, Z., Zhang, Lw. & Gu, Sd. FEM analysis of vacuum hot bulge forming of Hastelloy C-276 thin-walled cylindrical workpiece. J. Cent. South Univ. 21, 3019–3023 (2014). https://doi.org/10.1007/s11771-014-2271-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-014-2271-2