Detection of rolling contact sub-surface fatigue cracks using acoustic emission technique

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Lubrication Engineering; (United States)

OSTI ID:6293354

Yoshioka, T ^[1]

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1. Mechanical Engineering Lab., Tsukuba (Japan)

A method of locating the position of acoustic emission sources has been developed to analyze the mechanism of rolling contact fatigue. Using this method, sub-surface fatigue cracks were found at positions corresponding to the actual source positions of acoustic emissions. When fatigue tests were run under maximum stresses of 5.75 GPa and lubricant film parameters of 0.19, the cracks propagated parallel to the surface, had a maximum length of approximately 200 microns in the rolling direction of balls, and were distributed between 50 microns and 200 microns below the surface. Although the lubricant film parameter was small, no cracks from the surface were found. 12 refs.

• OSTI ID: 6293354
• Journal Information: Lubrication Engineering; (United States), Vol. 49:4; ISSN 0024-7154
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
CRACKS
DETECTION
ROLLER BEARINGS
ACOUSTIC EMISSION TESTING
CRACK PROPAGATION
FATIGUE
MECHANICAL VIBRATIONS
NONDESTRUCTIVE TESTING
SERVICE LIFE
ACOUSTIC TESTING
BEARINGS
LIFETIME
MATERIALS TESTING
MECHANICAL PROPERTIES
TESTING
420200* - Engineering- Facilities
Equipment
& Techniques
360103 - Metals & Alloys- Mechanical Properties