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Failure Analysis of the Fixing Bolts Fracture in Exciter

Yan Gao

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Abstract

The cause of incipient brittle fracture of inner-hexangular fixing bolt of exciter was studied,and its chemical composition,metallographic structure,hardness and fracture characters of fracturing bolt were also investigated.The results show that the hardness of the bolt is too high(419 HB),and its fracture morphology is intergranular brittle fracture.The cause of fracture is related with tempering temperature,machining defects on the surface and chemical composition of the fracture bolt.

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What this paper is about

The cause of incipient brittle fracture of inner-hexangular fixing bolt of exciter was studied,and its chemical composition,metallographic structure,hardness and fracture characters of fracturing bolt were also investigated.The results show that the hardness of the bolt is too high(419 HB),and its fracture morphology is intergranular brittle fracture.The cause of fracture is related with tempering temperature,machining defects on the surface and chemical composition of the fracture bolt.

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Available abstract

The cause of incipient brittle fracture of inner-hexangular fixing bolt of exciter was studied,and its chemical composition,metallographic structure,hardness and fracture characters of fracturing bolt were also investigated.The results show that the hardness of the bolt is too high(419 HB),and its fracture morphology is intergranular brittle fracture.The cause of fracture is related with tempering temperature,machining defects on the surface and chemical composition of the fracture bolt.

Key concepts: Materials science, Fracture (geology), Brittle fracture, Tempering, Exciter, Intergranular fracture, Brittleness, Composite material

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