Failure analysis of K-monel 500 (Ni-Cu-Al alloy) bolts

Authors
Es-Said, OS Zakharia, K Zakharia, Z Ventura, C Pfost, D Crawford, P Ward, T Raizk, D Foyos, J Marloth, R
Citation
Os. Es-said et al., Failure analysis of K-monel 500 (Ni-Cu-Al alloy) bolts, ENG FAIL AN, 7(5), 2000, pp. 323-332
Citations number
9
Categorie Soggetti
Mechanical Engineering
Journal title
ENGINEERING FAILURE ANALYSIS
ISSN journal
13506307 → ACNP
Volume
7
Issue
5
Year of publication
2000
Pages
323 - 332
Database
ISI
SICI code
1350-6307(200010)7:5<323:FAOK5(>2.0.ZU;2-V
Abstract
A bolt manufacturer used several subcontractors to fabricate K-monel 500 bo lts. The completed bolts failed mechanical testing, and the manufacturer as cribed the failure to the bar stock. Testing contracted by the supplier of the bar stock showed that it met specifications. Metallographic testing des cribed here shows that the bolts failed because of excessive grain growth a nd subsequent softening during heat treatment performed on the bolts after they were formed. Alternative heat treatments are discussed. (C) 2000 Elsev ier Science Ltd. All rights reserved.