Characterization of the microstructures and mechanical properties of 25CrMo48V martensitic steel tempered at different times

2013 ◽  
Vol 559 ◽  
pp. 130-134 ◽  
Author(s):  
Qingfeng Wang ◽  
Chuanyou Zhang ◽  
Ruixin Li ◽  
Jianzhong Gao ◽  
Mingzhi Wang ◽  
...  
2015 ◽  
Vol 55 (10) ◽  
pp. 2229-2236 ◽  
Author(s):  
Jun Hu ◽  
Wenquan Cao ◽  
Chongxiang Huang ◽  
Cunyu Wang ◽  
Han Dong ◽  
...  

Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.


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