https://reports.aerade.cranfield.ac.uk/handle/1826.2/4366 Tue, 21 Apr 2026 11:09:34 GMT 2026-04-21T11:09:34Z https://reports.aerade.cranfield.ac.uk/handle/1826.2/4376 High temperature creep properties of Mo T.Z.M. alloy Introduction This memorandum reports a series of experiments to determine some tensile creep properties of Mo T.Z.M. alloy at elevated temperatures in the range 1200°C to 1800°C, the material being in sheet form. A subsequent memorandum will report some creep properties of W-Th02 alloy. https://reports.aerade.cranfield.ac.uk/handle/1826.2/4376 https://reports.aerade.cranfield.ac.uk/handle/1826.2/4377 High temperature creep properties of W-ThO2 alloy Introduction This memorandum reports a series of experiments to determine some tensile creep properties of W.Th02 alloy at elevated temperatures. https://reports.aerade.cranfield.ac.uk/handle/1826.2/4377 https://reports.aerade.cranfield.ac.uk/handle/1826.2/4367 Research project 1 of the metal spraying and coating Division of the Institute of Welding: progress report no. 1 Introduction The quality of a sprayed metal deposit is known to be related to the nature of the prepared surface of the base metal. Grit blasting is a common method of surface preparation, and the actual profile or surface contour of the prepared surface can be varied considerably by variation in blasting conditions. The exact requirements of an acceptable surface have never been accurately stated, although a degree of undercut is. considered essential. The object of the present work is to develop a non-destructive method for the assessment of blasted mild steel surfaces in terms of suitability for metal spraying. Such a method needs to combine simplicity and speed, so that it can be used by normal inspection personnel without delaying production. Preferably the method should incorporate a 'failsafe! mechanism.. A number of possible assessment methods have been considered, but attention has been largely concentrated on measurement of the diffuse reflectivity of blasted surfaces. In reality, of course, this is simply an attempt to replace the eye in visual inspection with an instrument, and so remove the human element. Results have been reasonably encouraging, but it is obvious that many more samples need to be examined before a true judgement can be made. Some difficulty has been encountered in deciding the requirements for an acceptable surface. For this reason, a part of the experimental effort has been devoted to the examination of blasted surfaces, and to the measurement of bond strength after metal spraying. A brief review of literature has also been included. https://reports.aerade.cranfield.ac.uk/handle/1826.2/4367 https://reports.aerade.cranfield.ac.uk/handle/1826.2/4369 Assessment of blasted surfaces: progress report no. 2 Introduction Previous work had shown that the conditions of grit blasting markedly affected the reflectivity of a mild steel surface and that measurement of reflectivity thus offered a method for the assessment of blasted surfaces. The increase in reflectivity of a series of blasted specimens was found to relate to decreasing surface quality and, after metal spraying, to decreasing bond strength between the base and the sprayed metal. However, one series of specimens did not show any correlation between reflectivity and surface quality and it was decided that an examination of a considerable number of specimens prepared under more carefully controlled conditions was necessary for the next stage of the work. The present report gives the results of reflectivity and bond strength measurements on some 300 specimens of mild steel blasted under a number of different conditions by three suppliers. Reflectivity measurements again showed 'that specimens prepared by any one supplier could be placed in a series of increasing reflectivity, although some difficulties were still encountered in relating the result of different suppliers. These difficulties were most marked with specimens blasted with worn grit. However, correlation between reflectivity, pull-off strength and blasting conditions was good with the series of specimens provided by two suppliers. The series from a third supplier has not been fully tested yet, but very little difference in reflectivity readings has been found. https://reports.aerade.cranfield.ac.uk/handle/1826.2/4369