Accession Number : AD0290493


Title :   Beryllium Research and Development Program. Volume 1


Descriptive Note : Technical documentary rept. 1 Apr 1960-30 Sep 1961


Corporate Author : NUCLEAR METALS INC CONCORD MA


Personal Author(s) : Gelles, S H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/290493.pdf


Report Date : Oct 1962


Pagination or Media Count : 235


Abstract : The report summarizes the work conducted on the Beryllium Research and Development Program for the period April 1, 1960 through September 30, 1961. The aim of this program is to make beryllium more useful as an Air Force structural material. The program was divided into eleven major efforts, eight of which were subcontracted and three carried out at the site of the prime contractor, Nuclear Metals, Inc. Detailed abstracts of each program are represented in their respective sections. In, addition, work contemplated for a future program is described in a separate section. Two programs deal with the purification and evaluation of purified beryllium: (1) The Preparation of Pure Beryllium Metal by the Iodide Decomposition Method (Nuclear Materials and Equipment Corporation), (2) Purification of Beryllium by Distillation (Nuclear Metals, Inc.). Preparation of pure metal by decomposition of the iodide did not appear to be feasible. Four programs deal with the joining of beryllium: (1) Brazing of Beryllium (The Brush Beryllium Company), (2) The Forge Welding of Beryllium (The Brush Beryllium Company), (3) Investigation of the Ultrasonic Weldability of Beryllium Metal Sheet (Aeroprojects Inc.), (4) Resistance Welding of Beryllium Sheet (Rensselaer Polytechnic Institute). The feasibility of joining beryllium by ultrasonic welding was shown. The resistance spot welding program led to definition of the welding parameters, and to methods of altering the weld nugget structure and of eliminating cracking and porosity. The application of warm working in the form of roll-planishing improved to some extent the mechanical behavior of welds made by the Tungsten-arc Inert Gas (TIG) process. In the brazing effort, the optimum time and temperature for brazing beryllium with silver was defined and the effects of post-braze heat treatment on the room temperature and elevated temperature mechanical properties were determined.


Descriptors :   *BERYLLIUM , BERYLLIUM COMPOUNDS , DECOMPOSITION , ELECTRON MICROSCOPY , IODIDES , METALLURGY , MYCOBACTERIUM TUBERCULOSIS , PREPARATION , SHEETS , SURFACE PROPERTIES , WELDING


Subject Categories : Metallurgy and Metallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE