An empirical model for hot isostatic pressing of metal powders

1986 ◽  
Vol 17 (11) ◽  
pp. 1977-1984 ◽  
Author(s):  
M. M. Carroll
Keyword(s):  
Empirical Model ◽  
Hot Isostatic Pressing ◽  
Metal Powders ◽  
Isostatic Pressing

scholarly journals Study of Microstructure Features and Properties of Metals Obtained by Hot Isostatic Pressing

2021 ◽  
Vol 24 (4) ◽  
pp. 4-10
Author(s):  
A.A. Khlybov ◽  
D.A. Ryabov ◽  
M.S. Anosov ◽  
E.S. Belyaev
Keyword(s):  
Fractal Dimension ◽  
Relative Density ◽  
Metal Powder ◽  
Hot Isostatic Pressing ◽  
Microstructural Analysis ◽  
Fractal Dimensionality ◽  
Spherical Particles ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Different Temperatures

The aim of this research is to study the features of the structure and properties of alloys obtained using the technology of hot isostatic pressing (HIP) of metal powders. The study was carried out in the temperature range of interruption of the HIP cycle from 670 to 1150 °C on alloys 08Cr18Ni10Ti and Cr12MoV. For processing images of microstructures and assessing their fractal dimension, software has been developed in the MATLAB environment. The results of microstructural analysis of the metals under study showed that complete sintering of powders is observed at a HIP temperature of 1150 °C; at lower temperatures, pores and unsintered spherical particles of metal powder are observed in the microstructure of the alloys. The grain size of alloys obtained by HIP is determined, first of all, by the size of the initial fraction of the metal powder. Based on the results of evaluating the density of alloys obtained at different temperatures of the HIP, a relationship was established between the relative density of the alloy and the process temperature. Based on the results of fractal analysis, the relationship between the fractal dimensionality of the microstructure of the alloy and the HIP temperature and the relative density of the metals under study has been established. The obtained dependences are linear. The error in estimating the relative density from the obtained dependencies is, on average, 5 %. The data obtained in the course of the study make it possible to estimate the density of metals obtained by hot isostatic pressing of metal powders by evaluating the fractal dimension of the microstructure image.

Hot Isostatic Pressing of Metal Powders

Metallurgist ◽  
2015 ◽  
Vol 59 (7-8) ◽  
pp. 647-652 ◽  
Author(s):  
S. V. Ageev ◽  
V. L. Girshov
Keyword(s):  
Hot Isostatic Pressing ◽  
Metal Powders ◽  
Isostatic Pressing

Modelling of Hot Isostatic Pressing of Metal Powders

2003 ◽  
Vol 426-432 ◽  
pp. 4209-4214
Author(s):  
Evariste Ouedraogo ◽  
Laurent Sanchez
Keyword(s):  
Hot Isostatic Pressing ◽  
Metal Powders ◽  
Isostatic Pressing

Hot isostatic pressing of sendust metal powders

1992 ◽  
Vol 27 (6) ◽  
pp. 661-668 ◽  
Author(s):  
Y. Imaida ◽  
M. Takagawa ◽  
T. Kirimura ◽  
K. Hirota ◽  
O. Yamaguchi ◽  
...  
Keyword(s):  
Hot Isostatic Pressing ◽  
Metal Powders ◽  
Isostatic Pressing

Hot Isostatic Pressing of Inconel 600 and 690 Powders for Pressure Retaining Components

2011 ◽  
Author(s):  
Timothy C. Jelfs ◽  
W. Barry Burdett
Keyword(s):  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Good Control ◽  
Processing Parameters ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Inconel 600 ◽  
Inconel Alloys ◽  
Inconel 690

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it is possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. NNS items produced from HIPed powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which provide protection against forging route obsolescence. Setup costs are lower and batch sizes are smaller, which makes HIPping particularly well suited to small numbers of high integrity components. HIPed powder microstructures are isotropic and equiaxed, with uniformly fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Improved features to facilitate NDE are readily incorporated into the HIP assembly. Inclusion contents are lower and of more benign geometry, easing fracture assessment. In a broad program of testing, Rolls-Royce has established (1) that HIPed powder 316L/304L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance than the wrought equivalents. Rolls-Royce are extending their activities to HIPing of Inconel alloys. The first phase has been to HIP test samples of Inconel 600 and Inconel 690 alloys. Initial testing has produced promising results in line with expectations of wrought material. There has also been the opportunity to vary the HIPing cycle to assess the effect of processing parameters on the final product. An ability to HIP Inconel components is thought to be of benefit in new plant construction, where material is often not readily available in required thick section. The adaptability and good control of the HIP technique also shows promise as a manufacturing route for future high temperature materials which will be required in Generation 4 civil builds.

Sign in / Sign up

Export Citation Format

Share Document