Fracture surface microstructure and new fracture mechanism in the pearlite structure

Kai Zhai; Yujing Zhang; Jialong Yue; Yong Qiu; Xinru Zhou; Ke Zhao; Xiaomei Yu; Jinyou Zheng; Songjie Li; Dehai Ping

Journal of Materials Research and Technology (Jul 2024)

Fracture surface microstructure and new fracture mechanism in the pearlite structure

Kai Zhai,
Yujing Zhang,
Jialong Yue,
Yong Qiu,
Xinru Zhou,
Ke Zhao,
Xiaomei Yu,
Jinyou Zheng,
Songjie Li,
Dehai Ping

Affiliations

Kai Zhai: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Yujing Zhang: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Jialong Yue: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Yong Qiu: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Xinru Zhou: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Ke Zhao: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Xiaomei Yu: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Jinyou Zheng: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China
Songjie Li: School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Corresponding author.
Dehai Ping: Zhongyuan Critical Metals Laboratory, Zhengzhou University, 100 Science Avenue, Zhengzhou City, Henan Province, 450001, China; Corresponding author.

Journal volume & issue: Vol. 31
pp. 1885 – 1895

Abstract

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The fracture behaviours of pearlite structures in several typical carbon steels were investigated by scanning electron microscopy (SEM). Microstructural analysis indicated that the fracture of pearlite is a mixed ductile-brittle fracture, and brittle fracture has cleavage fracture characteristics, which often occur inside the pearlite structure. The fracture surface can exhibit any orientation relationship with the ferrite/cementite interface plane in the pearlite structure. The two phases in the pearlite structure (ferrite (α-Fe) and cementite (θ-Fe3C)) are fine grains rather than single-crystal platelets. The cleavage fracture mechanism in any direction of pearlite structure occurs due to the fine grain substructure.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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