ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Shear Band Failures in Threaded Titanium Alloy Fasteners
-
Published:2019
Abstract
Failure analysis was performed on threaded Ti-6Al-4V fasteners that had fractured in the threads during installation. Scanning electron microscopy (SEM) and optical metallography revealed that the fractures initiated in circumferential shear bands present at the thread roots. The fractures propagated by microvoid coalescence typical of that observed in notched tensile specimen fractures of the same material. For comparison, Ti-6Al-4V fasteners from various commercial sources were tested to failure in uniaxial tension and examined in the SEM. In all cases, the fracture appearances were similar to that exhibited by the fasteners that failed during installation. In addition, results of optical...
Sign in
ASM members
Member Sign InGeorge Hopple, Shear Band Failures in Threaded Titanium Alloy Fasteners, ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions, ASM International, 2019, https://doi.org/10.31399/asm.fach.usage.c9001660
Download citation file:
Understanding the Basics Collection
8-Volume Digital Library Exclusive
The Understanding the Basics Collection provides comprehensive coverage of critical topics in metallurgy. These introductory guides present critical information on key topics related to materials processing, performance, and evaluation.