Near net shape production of monolithic and composite high temperature ceramics by hot isostatic pressing (HIP)

Larker, Hans T.; Lundberg, Robert

doi:10.1016/s0955-2219(99)00109-0

Cited by 21 publications

(16 citation statements)

References 10 publications

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“…The technique is particularly well suited to the fabrication of components which require a relatively complex geometry, since the HIP'd part takes the shape of the pre-fabricated vessel or mold within which it is compressed, and HIP is thus known as an example of near net shape manufacture. [1,2] This makes HIP an alternative route to, for example, the production of multi-connected pipes, which would require additional machining and welding of forged pipes to produce a component of the same geometry. The ability to bypass unnecessary production stages is advantageous not only to the manufacturer in terms of reducing manufacturing time and associated costs, but also to structural integrity assessment procedures.…”

Section: Hot Isostatic Pressing (Hip) Is a Metal Formingmentioning

confidence: 99%

“…The chemical compositions used for Eqs. [1] and [2] were the average wt pct values as tabulated in Table I, and it should be noted that there is an error associated with the limit of detection and standard deviation.…”

Section: ½2mentioning

confidence: 99%

“…The number (1) in the headings of columns 6, 9, 11, and 12 indicates that calculations were performed using Eqs. [1] and [2].…”

Section: ½2mentioning

confidence: 99%

“…[1] and [2], respectively, the regression parameters of 4.4 and 29 were varied iteratively in order to minimize the percentage error between calculated and experimental values. Optimum regression parameters for Eqs.…”

Section: ½2mentioning

confidence: 99%

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Tensile Fracture Behavior of 316L Austenitic Stainless Steel Manufactured by Hot Isostatic Pressing

Cooper

Brayshaw

Sherry

2018

Metall Mater Trans A

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Herein we investigate how the oxygen content in hot isostatically pressed (HIP'd) 316L stainless steel affects the mechanical properties and tensile fracture behavior. This work follows on from previous studies, which aimed to understand the effect of oxygen content on the Charpy impact toughness of HIP'd steel. We expand on the work by performing room-temperature tensile testing on different heats of 316L stainless steel, which contain different levels of interstitial elements (carbon and nitrogen) as well as oxygen in the bulk material. Throughout the work we repeat the experiments on conventionally forged 316L steel as a reference material. The analysis of the work indicates that oxygen does not contribute to a measureable solution strengthening mechanism, as is the case with carbon and nitrogen in austenitic stainless steels (Werner in Mater Sci Eng A 101:93-98, 1988). Neither does oxygen, in the form of oxide inclusions, contribute to precipitation hardening due to the size and spacing of particles. However, the oxide particles do influence fracture behavior; fractography of the failed tension test specimens indicates that the average ductile dimple size is related to the oxygen content in the bulk material, the results of which support an on-going hypothesis relating oxygen content in HIP'd steels to their fracture mechanisms by providing additional sites for the initiation of ductile damage in the form of voids.

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Section: Hot Isostatic Pressing (Hip) Is a Metal Formingmentioning

confidence: 99%

Section: ½2mentioning

confidence: 99%

“…The number (1) in the headings of columns 6, 9, 11, and 12 indicates that calculations were performed using Eqs. [1] and [2].…”

Section: ½2mentioning

confidence: 99%

Section: ½2mentioning

confidence: 99%

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Tensile Fracture Behavior of 316L Austenitic Stainless Steel Manufactured by Hot Isostatic Pressing

Cooper

Brayshaw

Sherry

2018

Metall Mater Trans A

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“…[2] The merits of HIP'd steel over conventional steel are well documented [1,[3][4][5][6][7] ; HIP'd materials typically display an increased yield strength, ultimate tensile strength, and enhanced ductility over their forged counterparts. [4] The HIP'd materials typically exhibit a finer grain structure than conventionally forged materials.…”

Section: Introductionmentioning

confidence: 99%

A Microstructural Study on the Observed Differences in Charpy Impact Behavior Between Hot Isostatically Pressed and Forged 304L and 316L Austenitic Stainless Steel

Cooper

Bell

et al. 2015

Metall Mater Trans A

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With near-net shape technology becoming a more desirable route toward component manufacture due to its ability to reduce machining time and associated costs, it is important to demonstrate that components fabricated via Hot Isostatic Pressing (HIP) are able to perform to similar standards as those set by equivalent forged materials. This paper describes the results of a series of Charpy tests from HIP'd and forged 304L and 316L austenitic stainless steel, and assesses the differences in toughness values observed. The pre-test and post-test microstructures were examined to develop an understanding of the underlying reasons for the differences observed. The as-received microstructure of HIP'd material was found to contain micro-pores, which was not observed in the forged material. In tested specimens, martensite was detectable within close proximity to the fracture surface of Charpy specimens tested at 77 K (À196°C), and not detected in locations remote from the fracture surface, nor was martensite observed in specimens tested at ambient temperatures. The results suggest that the observed changes in the Charpy toughness are most likely to arise due to differences in as-received microstructures of HIP'd vs forged stainless steel.

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Oxide–Oxide Composites

Keller¹,

Jefferson²,

Kerans³

2014

Ceramic Matrix Composites

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Near net shape production of monolithic and composite high temperature ceramics by hot isostatic pressing (HIP)

Cited by 21 publications

References 10 publications

Tensile Fracture Behavior of 316L Austenitic Stainless Steel Manufactured by Hot Isostatic Pressing

Tensile Fracture Behavior of 316L Austenitic Stainless Steel Manufactured by Hot Isostatic Pressing

A Microstructural Study on the Observed Differences in Charpy Impact Behavior Between Hot Isostatically Pressed and Forged 304L and 316L Austenitic Stainless Steel

Oxide–Oxide Composites

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