Surface alloying of an Mg alloy subjected to surface mechanical attrition treatment

2008 ◽  
Vol 202 (16) ◽  
pp. 3947-3953 ◽  
Author(s):  
H.Q. Sun ◽  
Y.N. Shi ◽  
M.-X. Zhang ◽  
K. Lu
Keyword(s):  
Mg Alloy ◽  
Surface Mechanical Attrition Treatment ◽  
Surface Alloying ◽  
Mechanical Attrition

One way of surface alloying treatment on iron surface based on surface mechanical attrition treatment and heat treatment

2009 ◽  
Vol 255 (20) ◽  
pp. 8660-8666 ◽  
Author(s):  
Huayun Du ◽  
Yinghui Wei ◽  
Wanming Lin ◽  
Lifeng Hou ◽  
Zengqing Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Iron Surface ◽  
Surface Mechanical Attrition Treatment ◽  
Surface Alloying ◽  
Mechanical Attrition

Degradation of Mechanically Surface Treated AZ31B Magnesium Alloy in 3.5 wt.% NaCl Solution

2019 ◽  
Vol 948 ◽  
pp. 237-242 ◽  
Author(s):  
Budi Arifvianto ◽  
Suyitno ◽  
Muslim Mahardika
Keyword(s):  
Magnesium Alloy ◽  
Immersion Test ◽  
Mg Alloy ◽  
Surface Mechanical Attrition Treatment ◽  
Degradation Behavior ◽  
Nacl Solution ◽  
Az31b Magnesium Alloy ◽  
Mechanical And Tribological Properties ◽  
Weight Losses ◽  
Mechanical Attrition

Surface mechanical attrition treatment (SMAT) has so far been used as a technique for improving mechanical and tribological properties of magnesium and its alloys. However, the effects of the SMAT on corrosion and degradability of these materials are still rarely reported in open literature. In this research, the degradation behavior of AZ31B magnesium alloy after receiving the SMAT was characterized. The degradation behavior of the Mg alloy was determined from the weight losses after an immersion test for 24 h in 3.5 wt.% NaCl solution. During the test, the pH of the solution was also monitored. The results obviously showed higher corrosion rates of the Mg alloy that had been treated by using the SMAT. Interestingly, the degradation rate of the Mg alloy decreased once a longer duration of SMAT was applied. Meanwhile, the pH of NaCl solution increased up to 12 and 13.9 once the non-treated and the SMAT specimens were immersed into the solution, respectively. In addition, the energy dispersive X-ray spectroscopy (EDS) analysis confirmed the presence of corrosion products in all the Mg samples that were similar to those revealed in the literature.

The deformation behavior of AZ31 Mg alloy with surface mechanical attrition treatment

2017 ◽  
Vol 707 ◽  
pp. 636-646 ◽  
Author(s):  
Xiangchen Meng ◽  
Meng Duan ◽  
Lan Luo ◽  
Duochan Zhan ◽  
Bin Jin ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Mg Alloy ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Az31 Mg Alloy

Thermal Stability of Nanocrystallized Surface Layer in Al-Zn-Mg Alloy by Surface Mechanical Attrition Treatment

2007 ◽  
Vol 546-549 ◽  
pp. 1129-1134 ◽  
Author(s):  
Jin Fang Ma ◽  
Lan Qing Hu ◽  
Xu Guang Liu ◽  
Bing She Xu
Keyword(s):  
Thermal Stability ◽  
Grain Size ◽  
Surface Layer ◽  
Boundary Migration ◽  
Mg Alloy ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Nanostructured Layer ◽  
Average Grain Size ◽  
Thermal Stability Of

After surface mechanical attrition treatment (SMAT) for Al-Zn-Mg alloy, a gradient structure with average grain size increased from 20nm in surface layer to about 100nm at a depth of 20μm was formed. The thermal stability of surface nanostructured layer in Al-Zn-Mg alloy samples was investigated by vacuum annealing at 100°C, 150°C, 200°C and 250°C for 1h, respectively. The microstructural evolution as well as the microhardness along the depth from top surface layer to matrix of SMATed samples was analyzed. Experimental results showed that the grain size of surface nanocrystallites remains in submicro-scale, ranging from 300nm to 400nm, when annealed at a temperature of 250°C, and the microhardness of surface nanostructured layer was still high compared with that of matrix, indicating satisfying thermal stability of nanocrystallized layer. This might be attributed to the presence of substantive trident grain boundaries and pinning effect of dispersive precipitated phases in nanocrystalline materials, which hindered the grain boundary migration that leading to grain growth.

Surface Alloying of Mg Alloys After Surface Nanocrystallization

2008 ◽  
Vol 8 (5) ◽  
pp. 2724-2728 ◽  
Author(s):  
Ming-Xing Zhang ◽  
Yi-Nong Shi ◽  
Haiqing Sun ◽  
Patrick M. Kelly
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloys ◽  
Boundary Diffusion ◽  
Solution Treatment ◽  
Surface Mechanical Attrition Treatment ◽  
Az91 Alloy ◽  
Alloyed Layer ◽  
Surface Alloying ◽  
Surface Nanocrystallization ◽  
Mechanical Attrition

Surface nanocrystallization using a surface mechanical attrition treatment effectively activates the surface of magnesium alloys due to the increase in grain boundary diffusion channels. As a result, the temperature of subsequent surface alloying treatment of pure Mg and AZ91 alloy can be reduced from 430 °C to 380 °C. Thus, it is possible to combine the surface alloying process with the solution treatment for this type of alloy. After surface alloying, the hardness of the alloyed layer is 3 to 4 times higher than that of the substrate and this may significantly improve the wear resistance of magnesium alloys.

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