Internal cracking with crystal lattice failure of 2.93wt%Cr-Mn-Cu-Si iron under impact-abrasion. (June 2019)

• Record Type: Journal Article
• Authors: Li, Yi; Song, Renbo; Zhao, Zhiyang; Pei, Yu
• Is Part Of: Vacuum. Volume 164(2019)
• Page Start: 219
• Page End: 223
• Publication Date: 2019-06
• Subjects: Impact-abrasion -- Plastic deformation -- Diffraction angle -- Lattice relationship; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2019.03.028
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: As studies about materials having high resistance to impact-abrasion grow increasingly, a developed 2.93 wt%Cr-Mn-Cu-Si iron was tested under dry impact-abrasion. Apparatus involve repeated impact of a pin specimen on a rotating wheel with abrasive. Results indicate that plastic deformation makes positive effect on impact-abrasion resistance at primary stage of impact-abrasion. However, when number of impacts reaches around 7000, lattice relationship of M7 C3 and martensite begins to fail, making internal cracks regenerated. Then regenerated cracks propagate to M7 C3 's surface, reducing impact-abrasion resistance. With further cycling, cracks continue propagating into martensite from M7 C3 's surface, resulting in impact-abrasion resistance failure. Highlights: Plastic deformation makes positive effect on impact-abrasion resistance at primary stage of impact-abrasion. Internal cracking of 2.93 wt% Cr-Mn-Cu-Si iron is depend on diffraction angle of M7 C3 and lattice relationship of M7 C3 and martensite. Internal regenerated cracks start in M7 C3, then propagate into martensite, resulting in the failure of impact-abrasion resistance.