Investigation on Work Hardening Effect Generated during Dynamic Formation of Al-Based Coating on Magnesium Alloy

2013 ◽  
Vol 483 ◽  
pp. 75-78
Author(s):  
Xiao Ming Wang ◽  
Sheng Zhu ◽  
Xue Qiang Feng ◽  
Yu Xiang Liu

Numerical simulation of sequential collision behavior of multi-particles during dynamic formation of Al-based coating on magnesium alloy by supersonic particles deposition demonstrated that continuous tamping effect from subsequent sprayed particles improved significantly compression ratio of former deposited particle and promote effectively deformation and spread out. Analysis to morphology and microstructure of Al-based coating on magnesium alloy by SEM and TEM elicited that subsequent sprayed particles generated two effects including erosion and compaction to former deposited layer of the coating, induced formation of high density dislocation, grains refinement and re-crystallization, which played work-hardening strengthening effect and fine crystal strengthening effect to Al-Si coating.

2018 ◽  
Vol 25 (9) ◽  
pp. 995-1002 ◽  
Author(s):  
Zhong-lin Hou ◽  
Li-ming Liu ◽  
Xin-ze Lv ◽  
Jun Qiao ◽  
Hong-yang Wang

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2375
Author(s):  
Wufan Chen ◽  
Panpan Wan ◽  
Qingkun Zhao ◽  
Haofei Zhou

Gradient nanotwinned (GNT) metals exhibit extra strengthening and work hardening behaviors, which endow them impressive potentials in engineering applications. The increased strength is attributed to the dense interactions between dislocations and boundaries in the grain interiors. However, a constitutive model elucidating the extra strengthening effect is currently lacking. Here, we propose a theoretical framework to describe the mechanical response of GNT metals, especially the unusual extra strengthening behavior. The model captures the deformation mechanisms of GNT metals and coincides well with the reported experiment. The constitutive description developed in this work presents a tool to guide the structural design for developing gradient metallic materials.


2012 ◽  
Vol 217-219 ◽  
pp. 1928-1933
Author(s):  
Yu Cheng Zhang ◽  
Tian Yang Han ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei

The process of twin-roll casting including pouring, solidifying, rolling and cooling can be accomplished in a very short time. Consequently, some important process parameters in the twin-roll casting that are difficult to be obtained in experiment can be acquired using numerical simulation. In this paper, a numerical simulation based on a 2D finite element model of vertical twin-roll strip casting of magnesium alloy has been conducted, and the thermal stress fields are significantly discussed. The influences of key process parameters consisting of submerged nozzle depth and nozzle spray angle have been studied. The thermal cracks on the surface of the strip are analysed according to the thermal stress distribution.


2022 ◽  
Vol 75 ◽  
pp. 49-59
Author(s):  
Tao Yuan ◽  
Hongda Zhang ◽  
Xiaoqing Jiang ◽  
Shujun Chen ◽  
Min Xu ◽  
...  

2015 ◽  
Vol 44 (4) ◽  
pp. 414002
Author(s):  
姚红兵 YAO Hong-bing ◽  
于文龙 YU Wen-long ◽  
杨昭 YANG Zhao ◽  
李强 LI Qiang ◽  
高原 GAO Yuan ◽  
...  

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