Metallurgy Division - Semiannual Prog Rpt [Apr 10, 1954]

Read or Download Metallurgy Division - Semiannual Prog Rpt [Apr 10, 1954] PDF

Best metallurgy books

Wide-Gap Chalcopyrites

Chalcopyrites, specifically people with a large band hole, are interesting fabrics when it comes to their technological capability within the subsequent new release of thin-film sunlight cells and by way of their simple fabric houses. They express uniquely low illness formation energies, resulting in strange doping and part habit and to tremendous benign grain obstacles.

Introduction to physical metallurgy

The most principles and purposes of the metallurgy are supplied during this ebook.

Extra resources for Metallurgy Division - Semiannual Prog Rpt [Apr 10, 1954]

Example text

On the other hand, at slightly higher moisture contents, type 309SCb may f a i l and types 304L and 347 may perform satisfactorily. 6 vol % moisture, The chromizing treatment developed chromium-rich diffusion layers on the specimens. 015 M H,SO, for 200 hr at 250OC and 68 fps. 1 for specimens preoxidized without prior chromizing. One chromized and preoxidized coupon was inserted in the ninth position of a ten-specimen, tapered-bore holder so as to be exposed t o solution flow rates ranging from 45 t o 55 fps in the same run.

I - 6d and are being The standards were annealed, wrought specimens of types 304, 304L, 310, 309SCb, and 347 stainless steel. These specimens were loop-tested in straight-bore specimen holders under the conditions t o which the pins were exposed, except that the f l o w rate was at a subcritical 20 fps and the length of the run was 200 hr. The raised face possessed specimens have been reprepared tested i n a 4Whr run. by the flat-plate type o f specimen used i n t h i s study made larger f l a t areas available for surface study by metallographic examination; i n addition, the specimens can be used, with intermittent heat treatments, i f desired, for several corrosion tests.

I . __ I _- I - _ _ ~- found, with an intergranular layer throughout the sample. No deposit was found in any of the cold-leg sections examined. Some attack and carburization were found in the first or hottest section but not in theothers. , Diffraction and petrographic examination of the fluorides, before and after circulation, failed t o reveal any changes that might have caused plugging. It seems likely that the plugging in this loop was caused by o gradual freezing of the f l u a i d e r at a cold spot and not by corrosion.

Download PDF sample

Rated 4.17 of 5 – based on 40 votes