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Friction stir processing
About: Friction stir processing is a research topic. Over the lifetime, 2977 publications have been published within this topic receiving 62158 citations.
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TL;DR: In this article, a high-strength Mg-Y-Zn alloy plate was obtained by friction stir processing (FSP) after casting, which showed sufficiently high performance with low cost.
Abstract: High-strength Mg–Y–Zn alloy plate was obtained by friction stir processing (FSP) after casting. In this study, the Mg–Y–Zn alloy by FSP showed sufficiently high performance with low cost. As-cast material was held at 723 K for 95 h. It then showed a lamellar structure, which might have resulted from long-range periodic structure. However, this lamellar structure showed very low hardness, as did the as-cast material. Plates cut from heat-treated ingot were processed as single, overlapped double, and multiple pass FSP. After FSP, each processed materials was cut for microscopic measurement and hardness testing. Ultra-fine-grained microstructures are obtainable using the FSP. Micro-Vickers hardness tests for each pass result in the occurrence of strengthening for FSP of Mg–Y–Zn alloy. There was little change in grain size and hardness of prestirred zone by the next pass of stirring.
28 citations
TL;DR: In this paper, friction stir processing (FSP) was employed as a secondary process to improve the distribution of in situ formed TiB2 particles in Al-based composite, which not only enhanced the strength but also improved the ductility of the as-cast composite.
Abstract: Aluminum-based in situ composites suffer from the age-old issue of particle segregation along the grain boundaries after casting. In the present study, friction stir processing (FSP) was employed as a secondary process to improve the distribution of in situ formed TiB2 particles in Al-based composite. All the agglomerates of TiB2 were broken, and uniform distribution of particles was achieved after double-pass FSP. Also, FSP removed the casting defects and caused significant grain refinement of the Al matrix. The microstructure was characterized by equiaxed fine grains with average size of 3 µm and narrow grain size distribution. The microstructural refinements and homogenization after FSP not only enhanced the strength but also improved the ductility of the as-cast composite.
28 citations
TL;DR: In this article, a review of the recent research progress in FSP is discussed in detail with particular emphasis on their preparing method, characterization and various mechanical properties including present challenges and future prospects.
Abstract: Friction stir processing (FSP) is a new and exciting technique being extensively explored because of its thermo-mechanical surface modification which has the capability to enhance the mechanical, microstructural and tribological properties. Various studies were described on friction stir processed aluminium alloys using several reinforcement particles containing micro and nano size grains thereby the formation of homogeneous and identical microstructure. However, this review is mainly focused on Al-7075 alloy which is a potentially superplastic alloy for making metal matrix composites. In this review, the recent research progress in FSP is discussed in detail with particular emphasis on their preparing method, characterization and various mechanical properties including present challenges and future prospects. Though, a remarkable progress has been made during the past few years, the present status in materials processing is far from ideal, especially in obtaining desire composites by using single or dual reinforcements.
28 citations
TL;DR: In this paper, the effect of different process parameters, such as number of passes and tool rotational speed, was investigated to determine the changes in the properties of the aluminum alloy, and the results showed that the heat generation increases when rotational speeds increases.
28 citations