The picture above shows bread mold which is a type zygospore fungi. These fungi produce spores in the black stalk-like structures you can see in the picture.
Wootz steel is a steel characterized by a pattern of bands or sheets of micro carbides within a tempered martensite or pearlite matrix. It is the pioneering steel alloy matrix developed in South India in the sixth century BC and exported globally.It was also known in the ancient world as Seric Iron.ral tradition in India maintains that a small piece of either white or black hematite (or old wootz) had to be included in each melt, and that a minimum of these elements must be present in the steel for the proper segregation of the micro carbides to take place.
We study the friction stir welding (FSW) of AZ91D magnesium alloy. Casting materials are welded and their tensile strength is investigated. The analysis of the parameters of FSW process, such as the rotational speed of the tool, welding speed, and the influence of the axial force on tensile strength was carried out by using the Taguchi parametric design and the optimization approach.