Signs of In-Service Corrosion-Fatigue Damage to Stainless Steel of Heat-Exchanger Plates.

Autor:	Zvirko, О. І., Student, О. Z., Andreiko, І. М., Kurylas, М. S., Palash, R. V.
Předmět:	STAINLESS steel CORROSION fatigue IRON & steel plates PLATE heat exchangers FRACTURE mechanics MATERIAL plasticity
Zdroj:	Materials Science; Mar2022, Vol. 57 Issue 5, p626-632, 7p
Abstrakt:	We consider the case of in-service development of through defects in thin plates of heat exchangers separating the working and cooling media, which affects their functional properties as a result of mixing of the indicated media. The plates are made of 18Cr–8Ni-type steel with insignificant content of molybdenum characterized by the detected susceptibility to corrosion and stress-corrosion fracture in both media. The results of microfractographic analysis demonstrate that the formation of defects is caused by the corrosion pitting and corrosion-fatigue fracture of steel, mainly at the sites of contact of the ribs in neighboring plates. In the zones of local plastic deformation, as a result of contact fatigue, we observe the intense process of twinning, which most likely promotes the intergranular corrosive crack growth. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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