HOT TENSILE PROPERTIES OF AUTOGENOUS GAS TUNGSTEN ARC WELDED AISI 304HCU SUPER AUSTENITIC STAINLESS STEEL JOINTS
Keywords:
AISI 304HCu Austenitic stainless steel, Gas Tungsten Arc welding, Hot tensile properties, microstructureAbstract
The USC boilers operate at higher steam temperature and pressure which in turn increase the efficiency of the power plant. The recently developed AISI 304HCu austenitic stainless steel with nominal composition of 0.1C-18Cr-9Ni-3Cu-Nb-N is listed as a candidate material for superheaters and reheaters in the U.S program for development of materials for USC with steam temperatures of 760 °C. Welding may cause the changes in microstructure and result in local compositional variation due to segregation, which alters the solidified phases in room temperature and may affect the mechanical properties. The hot tensile properties of autogenously gas tungsten arc welded AISI 304HCu austenitic stainless steel tubes were evaluated. Autogenous welding of AISI 304HCu resulted in inferior weld joint with tensile strength lower than the parent metal both at room temperature and high temperatures.
Downloads
References
Brozda J (2007), “New generation austenitic steels used in supercritical power industry plant”, Journal of Welding International, Vol.21, 512-520.
Shuping Tan Zhen hua Wang Shi chang Cheng (2010), “Hot deformation behavior of Super304H austenitic heat resistant steel”, Journal Minerals Metallurgy Materials, Vol. 17, 167-172.
David S A Siefert J A Feng Z (2013), “Welding and weldability of candidate ferritic alloys for future advanced ultrasupercritical fossil power plants”, Journal of Science and Technology of Welding and Joining, Vol.18, 632-651.
Viswanathan R Henry J F Tanzosh J (2005), “U.S. program on materials technology for ultra-supercritical coal power plants”, Journal of Materials Engineering and Performance, Vol.14, 281-292.
Xinmei Li Yong Zou Zhong wen Zhang and Zengda Zou (2010), “Microstructure evolution of a novel super304H steel aged at high temperatures”, Journal of Materials Transactions, Vol.51, 305-309.
IndraniSen Amankwah E Kumar N S (2011), “Microstructure and mechanical properties of annealed SUS 304H austenitic stainless steel with copper”, Journal of Material Science and Engineering A, Vol. 528, 4491-4499.
Huachun Yang FangfangPeng Xiaoling Miao and Xiaochuan Yang (2006), “Investigation of the aging behavior on boiler steel tube super304H”, Journal of Pressure Equipments and System, Vol. 4, 96-99.
Xinmei Li Yong Zou Zhong wen Zhang (2010), “Microstructure evolution of a novel super 304H steel aged at high temperatures”, Journal of Material Transactions, Vol.51, 305-309.
Bai J W Liu P P Zhu Y M (2013), “Coherent precipitation of copper in Super 304H austenite steel”, Journal of Material Science and Engineering, Vol. (A) 584, 57-62.
Vu The Ha Woo Sang Jung (2012), “Creep behavior and microstructure evolution at 750 °C in a new precipitation strengthened heat resistant austenitic stainless steel”, Journal of Material Science and Engineering A, Vol. 558, 103-111.
Vekeman J Huysmans S De Bruycker E (2014), “Weldability assessment and high temperature properties of advanced creep resisting austenitic steel DMV304HCu”, Journal of Welding in the World” Vol. 58, 873-882.
Hoffman J P De jesus ASM (1989), “The distribution of boron in stainless steels as revealed by a nuclear technique”, Journal of South African Institute of Minerals and Metal, Vol.89, 81-87.
Karlsson L Andren H O Nord H (1982), “Grain boundary segregation in austenitic stainless steel containing boron - an atom probe study”, Journal of Scripta Metallurgica, Vol. 16, 297-302.
Afrin N Chen D L Cao X (2007), “Strain hardening behavior of a friction stir welded magnesium alloy”, Journal of Scripta Matereilia, Vol. 57, 1004-1007.
Elmer J W Allen S M Eagar T W (1989), “Microstructural development during solidification of stainless steel alloys”, Journal of Metallurgical Transactions A, Vol. 20, 2117-2131.
Gary M Carinci (1994), “Grain boundary segregation of boron in an austenitic stainless steel”, Journal of Applied Surface Science, Vol. 76, 266-271.
Villafuerte J C Kerr H W (1990), “Grain structures in gas tungsten-arc welds of austenitic stainless steels with ferrite primary phase”, Journal of Metallurgical Transactions A, Vol. 21, 979-986.
Choudhary B K RaoPalaparti D P (2012), “Comparative tensile flow and work hardening behaviour of thin section and forged thick section 9Cr-1Mo ferritic steel in the framework of voce equation and Kocks-Mecking approach”, Journal of Nuclear Materials, Vol. 430, 72-81.
