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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Proposal for tensile, working, hardness, and welding tests on various aluminium alloys.

Identifier  ExFiles\Box 117\1\  scan0074
Date  24th December 1935 guessed
  
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Tensile Tests.

Tests of strips 9" long x 1 1/2" wide, on pure aluminium and the alloys. Proof stress and Maximum Tensile stress.

Working Tests.

We suggest that we should do this test on the Swiss Alloys and R.R.75A only as we know what pure aluminium (1/4 hard) is like.

We suggest producing test pieces in the form of saucers, thus:-

[Diagram of a saucer-like test piece with dimensions 9.000, 1.000, and 1.250]

Besides information concerning the difficulties of working without annealing, we would like hardness tests of the metals after working.

Hardness Tests.

We would like hardness tests of the sheet to be taken for comparison with the hardness after working. Only Aluminium 1/4 hard and the alloys need be done.

Welding.
Tensile.
We would like to test the strength of welded butt joints by making welded tensile test pieces 9" x 1.5" thus:-

[Diagram of a welded butt joint test piece]

The weld should be hammered and ground off flush. Only aluminium 1/4 hard and the alloys need be done.

Hardness.

We would like to ascertain the hardness of the weld and of the metal adjacent to the weld.
We believe that Aluman and Peraluman need no heat treatment after welding, but that Anticorodal may do to restore its physical properties.
  
  


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