HST exhaust manifold failures : metallurgical examination of four failed castings and assessment of two alternative materials (TM-MF-119)

The Paxman Valenta exhaust manifold currently suffers a high rate of failure. In an attempt to find a strategy for increasing manifold life, 4 failed castings have been metallurgically examined and the fatigue properties of the current material, LM27TE,and possible alternative materials, strontium modified LM13TB7 and BS2789: Grade 420/12 SG...