T.C. Lowe and Y.T. Zhu
The first SPD-processed metals are commercially available now in a few market sectors. Although SPD technology is still at an early stage of development, the pace of work in this field has grown dramatically, and busy patent activity foreshadows that additional products and markets, encompassing a larger array of metals, are imminent. Large volume production of SPD metals is, however, not likely to emerge before the economics of continuous processing methods are established and greater penetration of key markets is secured.