To attain the best results of the metals that you will be using for whatever purpose you have in mind, two distinct alloys or metals must be bonded into one and the result is what you call the clad metals. When it comes to clad metals, they come in various forms ranging from the plate ones to the wire, rod, tube, and sheet forms. The alloys and metals that come common for engineering use are those that allow you to easily clad them together. Cladding is the best process to use to get specific composite material characteristics that you can never get in just one material. Find more here.
Heavy electroplating, heavy chemical deposition, co-rolling, casting, diffusion bonding, co-rolling, and co-extrusion are just some of the examples of processes that help in the bonding of clad metals. One example of the process of cladding and the use of clad metals include their use in jewelry starting with combining the durable characteristics of their base metals as well as the attractive characteristics found in precious metals.
Clad metals can be categorized into two, the first one being overlay clad and the second one being inlay clad.
The first classification of clad metals called inlay clads is the one that can provide you with exceptional and very sophisticated uses. With the use of an inlay, designers will be able to combine the use of less expensive materials such as stainless steel, copper, and brass with the use of more expensive materials such as silver, gold, platinum, and palladium. Such combination assists putting together the properties of precious metals with how you want them as well as the other properties of the other metal to their contribution in heat sinking, welding, and spring.
Going with inlay cladding has been shown to be more beneficial than the use of selective plating. It is only with the process of inlay cladding that utilization of wrought alloy is made possible. With this kind of process, you will get a better and higher composition out of your clad metals and the alloys that you once knew cannot be plated, they can now be better plated in more ways than one. By being great at selecting your materials, there is no doubt that you can have a well-accomplished surface that is more wear resistant, more dense, and harder than typical plated surfaces.
When you say overlay cladding, on the other hand, you are referring to a method that will combine different metal layers and put them into one. The use of filler materials or adhesives is not done with this particular method of bonding metals or alloys. If the both of these materials are used, bonding can still be attained with extreme heat or pressure. Normally, you can get a double clad made of three layers or single clad made of two layers and even as high as seven layers. What is great about overlay clads is that if you have certain requirements with your clad metals, you can specify what your industry needs of them. You can view here for more about clad metals and more.
For more information: https://en.wikipedia.org/wiki/Cladding