16 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "Booker, M.K."

open access

Progress toward analytical description of the creep strain-time behavior of engineering alloys

Elevated-temperature design methods in the United States often require a comprehensive description of the properties of the construction materials. These descriptions include representations for creep strain-time behavior as a function of stress, temperature, and material variability. Work conducted at this laboratory in the past five years toward the development of analytical techniques to derive such representations is summarized. Results for several common elevated-temperature structural mat… more

Date: January 1, 1980

Creator: Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Analytical description of the effects of melting practice and heat treatment on the creep properties of a 2 1/4 Cr-1 Mo steel

2/sup 1///sub 4/ Cr-1 Mo steel is used worldwide as an elevated-temperature structural material, particularly in steam generation systems. Since this material is often used at service temperatures up to 600/sup 0/C, successful design requires a consideration of its creep properties. Unfortunately, the development of an analytical description of the creep behavior of 2/sup 1///sub 4/ Cr-1 Mo steel is complicated by two phenomena. First, the creep strength of this material is quite sensitive to h… more

Date: January 1, 1977

Creator: Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Use of generalized regression models for the analysis of stress-rupture data

The design of components for operation in an elevated-temperature environment often requires a detailed consideration of the creep and creep-rupture properties of the construction materials involved. Techniques for the analysis and extrapolation of creep data have been widely discussed. The paper presents a generalized regression approach to the analysis of such data. This approach has been applied to multiple heat data sets for types 304 and 316 austenitic stainless steel, ferritic 2/sup 1///s… more

Date: January 1, 1978

Creator: Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Analytical representation of mechanical properties data for 2 1/4 Cr--1 Mo steel

An extensive program has been underway at the Oak Ridge National Laboratory (ORNL) for the last five years to develop analytical representations for various mechanical properties of 2 1/4 Cr--1 Mo steel. This program includes an evaluation of tensile, creep, fatigue, creep-fatigue, crack growth, and toughness data for this material. Data were collected from a variety of sources and stored in an existing computerized Data Storage and Retrieval System (DSRS) to facilitate analysis. Most of these … more

Date: January 1, 1978

Creator: Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Evaluation of creep and relaxation data for hastelloy alloy x sheet

Hastelloy alloy X has been a successful high-temperature structural material for more than two decades. Recently, Hastelloy alloy X sheet has been selected as a prime structural material for the proposed Brayton Isotope Power System (BIPS). The material also sees extensive application in the High-Temperature Gas-Cooled Reactor (HTGR). Design of these systems requires a detailed consideration of the high-temperature creep properties of this material. Therefore, available creep, creep-rupture, an… more

Date: February 1, 1979

Creator: Booker, M. K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Review of time-dependent fatigue behavior and life prediction for 2 1/4 Cr-1 Mo steel. [LMFBR]

Available data on creep-fatigue life and fracture behavior of 2 1/4 Cr-1 Mo steel are reviewed. Whereas creep-fatigue interaction is important for Type 304 stainless steel, oxidation effects appear to dominate the time-dependent fatigue behavior of 2 1/4 Cr-1 Mo steel. Four of the currently available predictive methods - the Linear Damage Rule, Frequency Separation Equation, Strain Range Partitioning Equation, and Damage Rate Equation - are evaluated for their predictive capability. Variations … more

Date: January 1, 1982

Creator: Booker, M. K. & Majumdar, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Study of tertiary creep instability in several elevated-temperature structural materials

Data for a number of common elevated temperature structural materials have been analyzed to yield mathematical predictions for the time and strain to tertiary creep at various rupture lives and temperatures. Materials examined include types 304 and 316 stainless steel, 2 1/4 Cr-1 Mo steel, alloy 800H, alloy 718, Hastelloy alloy X, and ERNiCr--3 weld metal. Data were typically examined over a range of creep temperatures for rupture lives ranging from less than 100 to greater than 10,000 hours. W… more

Date: January 1, 1978

Creator: Booker, M. K. & Sikka, V. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New methods of analysis of materials strength data for the ASME Boiler and Pressure Vessel Code

Tensile and creep data of the type used to establish allowable stress levels for the ASME Boiler and Pressure Vessel Code have been examined for type 321H stainless steel. Both inhomogeneous, unbalanced data sets and well-planned homogeneous data sets have been examined. Data have been analyzed by implementing standard manual techniques on a modern digital computer. In addition, more sophisticated techniques, practical only through the use of the computer, have been applied. The result clearly … more

Date: January 1, 1980

Creator: Booker, M. K. & Booker, B. L. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Overview of the U. S. programs on properties of primary circuit materials

The objective of U.S. Breeder Reactor Programs associated with primary circuit structural materials is to develop the design data base and associated design technology on existing commercially available materials as well as new alloys. This will permit economic operation of components at acceptable levels of plant availability and at up to 40-year lifetimes for inaccessible components. Long-term component reliability, elevated-temperature service within the creep range, and resistance to sodium… more

Date: January 1, 1977

Creator: Brinkman, C. R.; Sikka, V. K. & Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Influence of laboratory annealing on tensile properties and design stress intensity limits for Type 304 stainless steel

The influence of reannealing (laboratory annealing) on yield and ultimate tensile strength values of 19 heats of type 304 stainless steel was determined. Most heats were reannealed at 1065/sup 0/C for 0.5 hr. The reannealed properties were used to determine the influence of reannealing on time-independent design stress intensity limits (S/sub m/). The major findings are as follows: 1. Reannealing lowered the 0.2 percent yield strength versus temperature curve by approximately 42 MPa over the ra… more

Date: January 1, 1977

Creator: Sikka, V. K. & Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Comparison of the mechanical strength properties of several high-chromium ferritic steels

A modified 9 Cr-1 Mo ferritic steel has been selected as an alternative material for breeder reactors. Different 9 Cr-1 Mo steels are already being used commercially in UK and USA and a 9 Cr-2 Mo steel (EM12) is being used commercially in France. The 12% Cr steel alloy HT9 is also often recommended for high-temperature service. Creep-rupture data for all six seels were analyzed to yield rupture life as a function of stress, temperature, and lot-to-lot variations. Yield and tensile strength data… more

Date: January 1, 1981

Creator: Booker, M. K.; Sikka, V. K. & Booker, B. L. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fatigue behavior of 2 1/4 Cr--1 Mo steel in support of steam generator development

Designers of high-temperature power generation plants, both nuclear and fossil-fired, have made extensive use of 2 1/4 Cr--1 Mo steel for piping, shell, and tubing and as a tubesheet material in steam generators. While this material has been researched as much if not more than any other boiler material, an understanding of the time-dependent fatigue behavior for long-term service applications is still incomplete. Progress is reported in obtaining formulations that can be used for low and high c… more

Date: October 1, 1978

Creator: Brinkman, C. R.; Booker, M. K.; Strizak, J. P. & Weerasooriya, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Cyclic stress-strain behavior of ERNiCr-3 weld filler metal

Analytical representations were developed for the fatigue life and cyclic stress-strain resonse of AWS A5.14 Class ERNiCr-3 as observed during strain controlled cycling at a strain rate of 4 x 10/sup -3//s over strain ranges from 0.35 to 3.0% at 25, 343, 538, and 593/sup 0/C. Specific areas studied include fatigue life as a function of strain, cyclic hardening and softening during testing, development of cyclic stress-strain curves from stress-strain amplitude coordinates, and development of bi… more

Date: January 1, 1978

Creator: Baylor, V. B.; Booker, M. K.; Strizak, J. P. & Klueh, R. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Creep and creep-rupture behavior of Alloy 718

Data obtained from creep and creep-rupture tests conducted on 18 heats of Alloy 718 were used to formulate models for predicting high temperature time dependent behavior of this alloy. Creep tests were conducted on specimens taken from a number of commercial product forms including plate, bar, and forgoing material that had been procured and heat treated in accordance with ASTM specifications B-670 or B-637. Data were obtained over the temperature range of 427 to 760{degree}C ad at test times t… more

Date: January 1, 1991

Creator: Brinkman, C. R.; Booker, M. K. & Ding, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fatigue crack propagation in 2 1/4 Cr-1 Mo steel

The fatigue crack propagation of 2 1/4 Cr-1 Mo steel was examined in air over a wide range of experimental conditions. The fatigue crack growth rate was found to: generally increase monotonically with increasing temperature from 172/sup 0/ to 866/sup 0/K, except in the range where dynamic strain aging occurs, near 644/sup 0/K; increase with decreasing frequency at room temperatures above 783/sup 0/K - this frequency dependence was not observed below 783/sup 0/K; and increase with increases in m… more

Date: January 1, 1979

Creator: Corwin, W. R.; Booker, M. K.; Booker, B. L. P. & Brinkman, C. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Mechanical properties of transition joint materials in support of LMFBR steam generator design

Mechanical data needs are identified for transition joint weldments between austenitic and ferritic structural materials planned for LMFBR service. Since the heat-affected zone in the ferritic material is apparently the critical area, particular attention must be given to behavior in this region. Interim results are given to show differences in mechanical properties of the joint materials with particular emphasis on the ferritic materials.

Date: January 1, 1977

Creator: Brinkman, C. R.; King, J. F.; Strizak, J. P.; Klueh, R. L. & Booker, M. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department