Effect of Nb content on the microstructures and mechanical properties of Zr–Ti–Cu–Be–Nb glass-forming alloys

2011 ◽  
Vol 19 (2) ◽  
pp. 149-153 ◽  
Author(s):  
Junwei Qiao ◽  
Yong Zhang
2019 ◽  
Vol 28 (9) ◽  
pp. 5915-5915
Author(s):  
Qiang Li ◽  
Pu Miao ◽  
Junjie Li ◽  
Meifeng He ◽  
Masaaki Nakai ◽  
...  

2011 ◽  
Vol 675-677 ◽  
pp. 201-204
Author(s):  
Y.L. Du ◽  
H.W. Xu ◽  
J.L. Cheng ◽  
Guang Chen

In this work, the Cu46Zr42-xAl7Y5Nbx alloys with different Nb contents were prepared by water-cooled copper mold casting. The effects of Nb addition on the structural and mechanical properties were studied. It was found that the structure remains in amorphous state at low Nb concentration (x =1, 2). However, some crystalline phases appear in the high Nb content alloy (x > 2), showing a composite structure, that is, the second phase particles dispersed in an amorphous matrix. The effects of Nb on the glass-forming ability of Cu46Zr42Al7Y5 were studied by differential scanning calorimetric (DSC). The compressive mechanical properties of Cu46Zr42-xAl7Y5Nbx alloys were studied. It was found that the compressive strength can be improved by introducing Nb. However, the ductile of the alloys were not improved by the introduction of Nb.


2007 ◽  
Vol 539-543 ◽  
pp. 647-652 ◽  
Author(s):  
Han Sol Kim ◽  
Won Yong Kim

Microstructures and mechanical properties including elastic modulus were investigated in terms of ternary alloying elements Si addition, Nb content variations and tensile test. Martensite structure with α'(hcp) or α"(orthorhombic) was observed in Ti-xNb-1.5at.%Si, where x=10-20at.%. The crystal structure of martensite formed from water quenching process was largely dependent upon Nb content but does not on Si content. On the basis of experimental results obtained, it is suggested that Si has an effective role to suppress the precipitation of ω phase leading to reduction in elastic modulus in the metastable β phase region. Metastable β phase region was superior to reduce the elastic modulus than stable β phase region in the present alloy system. The minimum value of elastic modulus was measured to 48GPa. We have found that stress-induced martensitic transformation takes place during the deformation in the present alloys. Within the alloys having β(bcc) phase studied Nb-poor region appeared to exhibit a dominant behavior for stress-induced martensitic transformation than Nb-rich region. This result suggests that metastable β phase is superior to stable β phase for the occurrence of stress-induced martensitic transformation in the present alloy system.


2019 ◽  
Vol 28 (9) ◽  
pp. 5501-5508 ◽  
Author(s):  
Qiang Li ◽  
Pu Miao ◽  
Junjie Li ◽  
Meifeng He ◽  
Masaaki Nakai ◽  
...  

2019 ◽  
Vol 806 ◽  
pp. 1166-1179 ◽  
Author(s):  
Shuhui Lv ◽  
Fanzhi Meng ◽  
Xiaoling Lu ◽  
Qiang Yang ◽  
Xin Qiu ◽  
...  

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