A review of texture strengthening of titanium alloys

Babel, H. W.; Frederick, S. F.

doi:10.1007/bf03378751

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…The most actively studied of the commercial alloys is Ti-6AI-4V. [22,[62][63][64][65] A great deal of the rEsearch effort has been directed toward development of prJcedures designed to produce "ideal textures" for pressure-vessel applications. In these programs it has been !.hown that cross rolling at temperatures below 1500 F will produce such textures, and that once developed they are very persistant.…”

Section: Titanium-6ai-4vmentioning

confidence: 99%

“…This strain ratio, designated R, is defined as (21) From the strain-increment relations it can be shown that R=l::!. G (22) Similarly, for a y•direction test it can be shown that P, which is defined as x2 (27) Equation 27is plotted in Figure 33. Under the restrictions specified, it can be seen that the yield ellipses specified by Equation 27…”

Section: For Principal Stressesmentioning

confidence: 99%

“…Although this has received little commercial attention, it has been the subject of recent research. [21][22][23][24] "Texture hardening" [21] of titanium has been demonstrated in the laboratory for plane stress loading of sheet materials. It has been shown that, for biaxial loading in tension-tension, the largest improvements in yield strength would probably occur in an hcp metal with creation of an ideal texture, i.e .. basal planes oriented parallel to the sheet surface.…”

Section: Introductionmentioning

confidence: 99%

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Properties of Textured Titanium Alloys

Larson¹,

Zarkades²

1974

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43201. MCIC's objective is to provide a comprehensive current resource of technical information on the development and utilization of advanced metal-or ceramic-base materials. The Center is operated by Battelle-Columbus under Contract Number DSA900-74-C-0616 for the U.S. Defense Supply Agency; technical aspects of MCIC operations are monitored by the Army Materials and Mechanics Research Center. The support of these sponsor organizations is gratefully acknowledged. This document was prepared under the sponsorship of the Department of Defense. r-.;either the United States Government nor any person acti11g on behalf of the United States Government assumes any liabil1ty resulting from the use or publication of the information conta1ned in this document or warrants that such use or publication will be free from pr1vately owned rights. Approved for public release; distribution unlim1ted All nghts reserved. This document, or parts thereof. may not be reproduced in any form without written permission of the Metals and Ceram1cs Information Center. .. II i J TABLE OF CONTENTS SUMMARY INTRODUCTION BACKGROUND. Textures in Titanium Deformation Mechanisms Cold-Rolled Textures Annealing Textures. .

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Section: Titanium-6ai-4vmentioning

confidence: 99%

Section: For Principal Stressesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Properties of Textured Titanium Alloys

Larson¹,

Zarkades²

1974

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“…As a result, the estimation of the anisotropy by the r value is not so irrelevant. (Received June 27, 1986) Keywords: biaxial tensile test, anisotropy of sheet, texture, titanium, relation of the orientation between neighboring grains Pure titanium has an hcp structure at room temperature and slip directions of slip systems are all on the basal plane (1) In this experiment, two differently textured titanium sheets were used(7). They were hot rolled sheets 5 mm thick.…”

Section: By Yonosukementioning

confidence: 99%

“…The measurement accuracy was 0.001mm. 1. Uniaxial tensile tests Figure 3 shows the results of uniaxial tensile tests.…”

Section: By Yonosukementioning

confidence: 99%

Effect of the Texture and the Orientation Relation between Neighboring Grains on the Mechanical Behavior of Titanium Sheets

1987

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tensile tests and hydraulic bulge tests were carried out for two differently textured sheets of pure titanium. The sheets were previously examined for the orientation distribution of grains, containing the orientation relation between neighboring grains. The deformation behavior of the titanium sheets was examined in connection with the effect of the orientation difference between neighboring grains on the deformation mechanism of grains. In the case of the uniaxial tensile test, the correlation in the 0.2% proof stress among differently textured sheets and different test directions can be explained by the preferred orientation of the sheets. However, the plastic flow curves are influenced by the orientation difference between neighboring grains. In the sheets rolled unidirectionally at 1173 K, the orientation difference of the c-axis between neighborsmaller than that of the 0.2% proof stress, and the slope of the stress to the strain is larger than that of the sheets cross rolled at 873 K. Stress-strain curves and effective stress-effective strain curves of two differently textured titanium sheets, which were estimated from the hydraulic bulge test using the Hill's theory for the anisotropy, were examined. Since the preferred orientation in the sheets cross-rolled at 873 K is (0001)[1010] and the orientation difference of the c-axis between neighboring grains is small, the deformation mechanism of grains under the biaxial tension is extremely different from that under the uniaxial tension. Therefore, as pointed out previously, the overestimation of the anisotropy by the r value takes place. Though the r values of the sheets rolled unidirectionally at 1173 K are relatively high (from 2 to 5), the difference in the deformation mechanism of grains between different loading conditions is small because of the plastic constraint among neighboring grains. As a result, the estimation of the anisotropy by the r value is not so irrelevant.

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