Lightweight design using high‐strength aluminum alloys has gained importance due to the continuing need for weight reduction and increasing crash safety requirements in automotive industry. There are various manufacturing processes available processing alloys. Herein, production of parts by roll forming stamping based on example an AA7075‐T6 hat profile is compared. Roll represents a continuous...

In order to clarify the role of different post-weld heat treatment processes in manufacturing process, welding tests, and finite element analysis (FEA) are carried out for 12C1MoV steel pipes. The simulated temperature field residual stress agree well with measured results, which indicates that simulation method is available. influence process parameters on reduction results further analyzed. I...

Selected prehistoric potsherds from the deepest cultural level of the oldest known archaeological site in the Kingdom of Tonga, within the Eastern Lapita province of western Polynesia, display decorative motifs characteristic of the Western Lapita province of modern-day Island Melanesia, to the west. Most of the stylistically anomalous sherds contain temper sands exotic to Tonga but, in one cas...

A child whose management and training never present difficulties is not a normal child, and when we speak of a ' difficult ' child, we mean by the term special difficulty either in degree or nature, or in both. The difficulty is frequently one of behaviour, such as, for example, disobedience, lying, fighting, temper, thieving, enuresis. All such are instances of difficulty of excessive degree, ...