Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,961 pages of information and 228,875 images on early companies, their products and the people who designed and built them.

Alfred Wilm

From Graces Guide

Jump to: navigation, search

Alfred Wilm (1869–1937) was a German metallurgist who invented the alloy Al-3.5–5.5%Cu-Mg-Mn, now known as duraluminium, which is used extensively in aircraft.

Whilst working in military research centre in Neubabelsberg in 1901, Wilm discovered age hardening, in particular age hardening of aluminium alloys. This discovery was made after hardness measurements on Al-Cu alloy specimens were serendipitously found to increase in hardness at room temperature. This increase in hardness was identified after his measurements were interrupted by a weekend, and when resumed on the Monday the hardness had increased.

By 1906, Wilm had developed an alloy – Al-3.5–5.5%Cu-Mg-Mn, Mg and Mn were < 1%, for which a patent was filed. Later this patent was purchased and the alloy marketed as duralinium.

Wilm did not write his first article on age hardening until 1911. At the time Wilm was developing an aluminium alloy to replace brass in ammunition. The patent on duralumium was ignored and breached by a many firms and he struggled without success to protect his rights under it.

In 1919 Wilm retired from research and became a farmer.

He died at his farm in Saalberg on 6 August 1937

See Also


Sources of Information