Failure analysis of high temperature studs

Ghosh Chowdhury, S and Kumar, Pravesh and Das, Swapan K and Bhattacharya, D K and Parida, N (2001) Failure analysis of high temperature studs. Engineering Failure Analysis, 8 (6). pp. 521-528.



Studs in the interceptor valve of a 110 MW unit failed after a service life of 148,700 h. The studs were operated under a steam pressure of 35 kg/cm2 and a temperature of 535°C. The studs were fractured at one end of the threaded end. Various techniques were employed to analyse the failure of the studs. It has been concluded that the failure of the studs was due to reverse temper embrittlement. The failure was delayed due to the presence of Mo and V. To reduce the tendency to this kind of failure, the following steps were recommended: (a) reduce the phosphorus content in the steel to a low level or (b) reduce the grain size to about 10 μm.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Temper embrittlement; Fasteners; Heat treatment; Intergranular fracture; Impact energy
Divisions:Material Science and Technology
ID Code:352
Deposited On:07 Dec 2009 18:17
Last Modified:15 Dec 2011 10:39
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