Elevated Temperature Wear Maps of X40 and Mar-M247 Alloys

Author:

Saito Yoshiyuki1,Mino Kazuaki1

Affiliation:

1. Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., Toyosu, Koto-ku, Tokyo 135, Japan

Abstract

Self-mated wear tests of X40 (Cobalt-base alloy) and Mar-M247 (Nickel base alloy) were conducted under unlubricated sliding conditions using a pin-on-disk tester. Wear maps were constructed for both alloys over the temperature range of room temperature to 1173 K at relatively low sliding speed. Microstructural and chemical information has been obtained by using various microscopies, an X-ray diffractometer, and an X-ray photo-electron spectroscopy. They show that the wear resistance of X40 is superior to that of Mar-M247 at room temperature due to the lower concentration of metallic state elements and higher concentration of Cr2O3 and Co (OH)2 at the surface of X40. The degradation in the wear resistance of X40 at about 500 K was attributed to the decrease in Cr2O3 and Co(OH)2 concentrations at the surface.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Reference9 articles.

1. Cowan, Richard S., and Winer, Ward O., 1992, “Frictional Heating Calculations,” ASM Handbook Vol. 18, Friction, Lubrication and Wear Technology, ASM International, pp. 39–44.

2. Crook, P., and Li, C. C., 1983, “The Elevated Temperature Metal-to-Metal Wear Behavior of Selected Hardfacing Alloys,” Wear of Materials 1983, K. C. Ludema, ed., ASME, pp. 272–278.

3. Crook, P., and Levy, A. V., 1992, “Friction and Wear of Cobalt-Base Wrought Alloys,” ASM Handbook Vol. 18, Friction, Lubrication and Wear Technology, ASM International, pp. 766–771.

4. Holm R. , 1948, “Calculation of the Temperature Development in a Contact Heated in the Contact Surface and Application to the Problem on the Temperature Rise in a Sliding Contact,” J. Appl. Phys., Vol. 19, pp. 361–366.

5. Lim S. C. , and AshbyM. F., 1987, “Wear-Mechanism Maps,” Acta Metallurgica, Vol. 35, pp. 1–24.

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