Critial Review Of Technical Papers Ohio State University Assignment

674 words - 3 pages

Paper 1:
In this paper, the authors present the idea to achieve combined properties of aluminum alloys and stainless steel and to develop reliable joints between both. He also states the difficulties in achieving the same due to their dissimilar melting points which is one of the important parameter of friction stir welding. The author performs several tests to attain values and optical micrography to define all the seven distinct regions for the joining of dissimilar metals and discusses the results on the same.
Throughout the paper the authors choose certain processes in an attempt t show the superiority of FSW over the other welding processes. However, authors fail to justify why they choose these processes over others. An example of this is the authors use a to show the superiority
The authors discuss several experimental results throughout the paper, however they omit how these experiments were carried out. For example?
The author mentions four properties of friction stir welding in the introduction which make it apt for applications in aerospace, automotive, marine and nuclear assemblies. However, the authors did not reference his claims on the advantages of using FSW over other processes. but he should have had a quantitative approach to justify his claim. In this paper, EDX analysis was performed to evaluate diffusion transition of elements but how accurate is it? That is a question that has not been answered in this paper.
Also, author does not clarify how he draws the conclusion that hardness value slightly decreases in the TMAZ zone which is attributed to the second phase particle dissolution and coarsening caused by thermo-mechanical conditions.
Research gap:
1. The author based his results on a certain set of tool condition like rotational speed and travel speed, but why only those conditions? What about the other conditions? He does not state the change in hardness with the speed of the tool which is a research gap.
2. The author has considered a single method to evaluate different parameters. However, author should have evaluated the s...

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