Deformation and fracture mechanisms of selective laser melted tungsten skeleton reinforced copper matrix composites at varied temperatures

Li, Rong, Chen, Wenge, Zhou, Kai, Yang, Yana, Dong, Longlong, Elmarakbi, Ahmed and Fu, Yong Qing (2023) Deformation and fracture mechanisms of selective laser melted tungsten skeleton reinforced copper matrix composites at varied temperatures. Materials Letters, 332. p. 133550. ISSN 0167-577X

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Abstract

Tungsten skeleton reinforced copper matrix composites (TRC) were designed and fabricated using a selective laser melting (SLM) method followed by infiltration sintering. Deformation and fracture mechanisms were investigated at 25, 300 and 500 °C. Compressive and tensile tests of the tungsten skeletons showed brittle fracture mode, whereas tensile tests of the TRC exhibited a mixed mode of ductile and brittle fracture. Fracture mechanisms of the TRC were identified as cleavage of tungsten and separation between copper and tungsten at 25 °C. Whereas at 300 and 500 °C, its fracture mechanisms were identified as intergranular fracture of tungsten particles, tearing of copper and separation between copper and tungsten.

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