Deformation behavior of high speed steel/low Carbon steel composite with harmonic structure by MM/SPS process

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Tsuzuki, Y.^1 ; Fujiwara, H.^2 ; Miyamoto, H.^2 ; Ameyama, K.^3

Graduate School of Science and Engineering, Doshisha University, Japan^1

Department of Mechanical and Systems Engineering, Doshisha University, Japan^2

Department of Mechanical Engineering, Ritsumeikan University, Japan^3

关键词: Composite compacts;    Deformation behavior;    Harmonic structures;    Mechanical milling;    Microstructure and mechanical properties;    Microstructure observation;    Severe plastic deformations;    Spark plasma sintering process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012029/pdf
DOI  :  10.1088/1757-899X/63/1/012029

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The harmonic-structured composite that consists of a network fine grain region with a high speed steel and a dispersed coarse grain region with a low carbon steel was fabricated prepared using a mechanical milling, which is one of the severe plastic deformation method, and spark plasma sintering process. The microstructure and mechanical properties harmonic- structured composite compact were evaluated by a scaning electron microscope and a tensile test, respectively. The harmonic-structured composite exhibited high strength and enough ductility compared with a conventional particle-dispersed composite with the same weight ratio of high speed steel/low carbon steel. The microstructure observation of harmonic-structured composite revieals that the superior elongation of the harmonic-structured composite is attributed to the plastic deformation around the cracks which initiate at the network area.