NDLI: Microstructure-Texture-Mechanical Properties in Hot Rolling of a Centrifugal Casting Ring Blank

Content Provider	Springer Nature Link
Author	Qin, Fang cheng Li, Yong tang Qi, Hui ping Ju, Li
Copyright Year	2016
Abstract	Deformation characteristic of centrifugal casting 25Mn steel was investigated by compression tests, and then processing maps were established. According to the deformation parameters identified from the established processing maps and hot ring rolling (HRR) process, the industrial test for the 25Mn ring blank was performed. Optical microscope (OM) and electron backscatter diffraction (EBSD) techniques were used for detecting grain boundary features and textures of deformation structures. The morphologies and mechanisms of tensile and impact fracture were revealed. The results show that softening effect plays a dominant role in higher temperatures of 1050-1150 °C and strain rates lower than 0.1 s$^{−1}$. The average grain size of the rolled 25Mn ring is about 28 μm, but the grains are more coarse and inhomogeneous on the middle layer than that on rest of the areas. The texture on the outer layer is characterized by strong {110} 〈112〉 and weak {112} 〈111〉, followed by {001} 〈100〉 and {001} 〈110〉 on the inner layer and {110} 〈110〉 on the center layer, which is mainly associated with the shear deformation. The rolled ring with precise geometrical dimensions and sound mechanical properties is fabricated by HRR. Tensile fracture is composed of clear river-shaped pattern and a little dimple near the inner layer and outer layer, and the fracture mechanism is mainly quasi-cleavage fracture, accompanied by dimple fracture. The morphologies of impact fracture consist of tear ridge and cleavage platform.
Starting Page	1237
Ending Page	1248
Page Count	12
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	25
Issue Number	3
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2016-02-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	centrifugal casting ring blank dimple fracture hot rolling microstructure texture Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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