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RESEARCH PAPERS: Additional Research Papers

High Temperature Low-Cycle Fatigue of Friction Welded Joints-Type 304-304 Stainless Steel and Alloy 718-718 Nickel Base Superalloy

[+] Author and Article Information
T. Wakai

Oarai Engineering Center, Structural Engineering Section, Power Reactor & Nuclear Fuel Development Corporation, Ibaraki, 311-13, Japan

M. Sakane, M. Ohnami

Department of Mechanical Engineering, Ritsumeikan University, Kyoto, Japan

K. Okita

Hyogo Prefectural Institute of Industrial Research, Technical Center for Machinery and Metals, Miki, 673-04, Japan

Y. Fukuchi

Hyogo Prefectural Institute of Industrial Research, Kobe, 654, Japan

J. Eng. Mater. Technol 115(1), 109-115 (Jan 01, 1993) (7 pages) doi:10.1115/1.2902142 History: Received November 29, 1990; Revised June 03, 1992; Online April 29, 2008

Abstract

This paper assesses the high-temperature low-cycle fatigue of the Type 304 stainless steel and Alloy 718 superalloy friction-welded joints. Strain controlled low-cycle fatigue tests for 304-304 and 718-718 friction-welded specimens were carried out at 923K in air to obtain the fatigue strength of the joints. These materials were selected as the cyclic hardening and softening materials, respectively. The 304-304 welded specimens showed inferior fatigue strength in comparison with the base metal while the 718-718 specimens exhibited fatigue strength equivalent to that of the base metal. The difference in the fatigue strength between the two materials is discussed from the viewpoint of the cyclic deformation behavior and strain reduction at weld interface.

Copyright © 1993 by The American Society of Mechanical Engineers
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