The Creep Of Steel At High Temperatures Classic Reprint

Excerpt from The Creep of Steel at High Temperatures Above red heat, steel has yielding characteristics not usually associated with it at ordinary temperatures. We do not, as yet, have sufficient information to indicate definitely into which class of solid or fluid flow hot steel belongs. It may be either a plastic solid or a viscous fluid, or combine the properties of both. A viscous fluid, of which pitch is a good example, has the flow characteristics Shown in curve (a) of Fig. 1. The rate of flow is proportional to the load, even down to the smallest values, and yet a great resistance may be Offered against loads acting for a short time. This class of materials has no true elasticity and therefore no yield point. A plastic solid, such as wet clay, has flow characteristics as shown in curve (b) of Fig. 1. Here we have a more complicated condition. Until the load reaches a certain value there is no flow or extension, but after this point is reached the flow increases regularly in proportion to the load in excess of this value. It will be noted that the flow curve does not reach zero at a definite value of load, but approaches the axis gradually. We do not know the exact cause of this departure from a straight line at low flow rates, but it is probably due to the fact that plastic solids are made up of grains or particles of various sizes and shapes and some are less resistant to pressure than others. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from The Creep of Steel at High Temperatures This investigation on the creep resistance of steels was undertaken at the request of the Babcock & Wilcox Co., to provide engineering data at the higher temperatures. The work was carried out in the Department of Physics at the Massachusetts Institute of Technology. The difficulties in the path of accurately determining the creep resistance are evidenced by the wide diversity of values obtained by different experimenters, and there is still much to be done on the development of research apparatus. The type of flow occurring ¡11 steel is not certain, even after the subject has been studied by scores of experimenters. There is need of more fundamental research. In the meantime, however, the designer requires engineering data on a large variety of steels for high temperature use. It has been attempted here to supply this data for a considerable number of materials at the higher temperatures. The author desires to express his indebtedness to Mr. J. B. Romer for the inetallographic examination of the test specimens, and to Prof. Albert Sauveur and Dr. R. S. Williams for examining the manuscript. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Creep in Five Steels at Different Temperatures Within the past five years many investigations have been made in this field, but the information obtained has apparently not satisfied the requirements of designing engineers who insist upon having a more nearly quantitative evaluation of the relations between stress, temperature, elongation, and time for different metals. This report is prepared to permit selection of working stresses for five, steels at temperatures between atmospheric and F. (732 Preliminary results for three of these were previously reported (8, Comparisons are given of the results of the creep tests with short-time tension tests at corresponding temperatures. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Tensile Properties of Some Structural Alloy Steels at High Temperatures In 1913 Schulz4 reviewed available data relating to the high temperature properties of turbine materials, but the information presented for alloy steels was, in large part, for those containing varying proportions Of nickel. Guillet5 reported, among several special alloys for use at high temperatures, a steel containing nickel, chromium, and tungsten which showed exceptionally high strength at 750 to 800 C (1380 to 1470 F). About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Provides information from around the world on creep in multiple high-temperature metals, alloys, and advanced materials.