High-temperature small punch test for mechanical characterization of a nickel-base super alloy

Soltysiak, Stefan; Selent, M.; Roth, Stephan V.; Abendroth, Martin; Hoffmann, Markus M.; Biermann, Horst; Kuna, Meinhard

doi:10.1016/j.msea.2014.06.105

Cited by 18 publications

(7 citation statements)

References 10 publications

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“…The SP fracture surfaces depicted in Figure 7 identify key differences in deformation behaviour between each C263 variant across both temperature regimes. Cast C263 tested at RT ( Figure 6 b) reveals faceted features on the crack surface, with this cleavage-type fracture suggesting the material failed in a relatively brittle fashion [ 12 , 25 , 26 , 27 ]. At 780 °C ( Figure 6 d), the fracture surface was not dissimilar, showing facet-like features indicating a moderately swift rupture, highlighting the microstructural stability of the material at the two temperatures, as was identified in the SPT results and uniaxial correlations.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, the test method has proven to be a useful tool to rank the mechanical performance of materials under creep and tensile-like conditions [ 8 , 10 ]. In some cases, stress–strain data may be obtained for ductile materials through Small Punch Tensile (SPT) by means of finite element analysis along with sequential programming [ 11 , 12 ]. The technique involves the biaxial deformation of a miniature disc by a static or variable load, using a hemi-spherical indenter punch, generating load-displacement or displacement-time data through the SP tensile or creep derivatives, respectively.…”

Section: Introductionmentioning

confidence: 99%

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High Temperature Deformation Mechanisms in a DLD Nickel Superalloy

et al. 2017

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The realisation of employing Additive Layer Manufacturing (ALM) technologies to produce components in the aerospace industry is significantly increasing. This can be attributed to their ability to offer the near-net shape fabrication of fully dense components with a high potential for geometrical optimisation, all of which contribute to subsequent reductions in material wastage and component weight. However, the influence of this manufacturing route on the properties of aerospace alloys must first be fully understood before being actively applied in-service. Specimens from the nickel superalloy C263 have been manufactured using Powder Bed Direct Laser Deposition (PB-DLD), each with unique post-processing conditions. These variables include two build orientations, vertical and horizontal, and two different heat treatments. The effects of build orientation and post-process heat treatments on the materials’ mechanical properties have been assessed with the Small Punch Tensile (SPT) test technique, a practical test method given the limited availability of PB-DLD consolidated material. SPT testing was also conducted on a cast C263 variant to compare with PB-DLD derivatives. At both room and elevated temperature conditions, differences in mechanical performances arose between each material variant. This was found to be instigated by microstructural variations exposed through microscopic and Energy Dispersive X-ray Spectroscopy (EDS) analysis. SPT results were also compared with available uniaxial tensile data in terms of SPT peak and yield load against uniaxial ultimate tensile and yield strength.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Temperature Deformation Mechanisms in a DLD Nickel Superalloy

et al. 2017

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“…Annealing processes can be used as a low-cost process to improve the mechanical properties of the material. The interesting effects of thermal aging on the components produced using additive techniques can be found in [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 ].…”

Section: Effect Of Thermal Aging Conditions On the Properties Of 3d-p...mentioning

confidence: 99%

Resistance of 3D-Printed Components, Test Specimens and Products to Work under Environmental Conditions—Review

et al. 2022

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The development of additive manufacturing methods known as “3D printing” started in the 1980s. In these methods, spatial models are created from a semi-finished product such as a powder, filament or liquid. The model is most often created in layers, which are created from the semi-finished product, which is most often subjected to thermal treatment or using light or ultraviolet rays. The technology of additive manufacturing has both advantages and disadvantages when compared to the traditionally used methods of processing thermoplastic materials, such as, for example, injection or extrusion. The most important advantages are low cost, flexibility and speed of manufacturing of elements with different spatial shapes. From the point of view of the user of the product, the most important disadvantages are the lower mechanical properties and lower resistance to environmental factors that occur during the use of the manufactured products. The purpose of this review is to present current information and a compilation of features in the field of research on the effects of the interactions of different types of environments on the mechanical properties of 3D-manufactured thermoplastic products. Changes in the structure and mechanical properties of the material under the influence of factors such as humidity, salt, temperature, UV rays, gasoline and the environment of the human body are presented. The presented article enables the effects of environmental conditions on common materials used in 3D printing technology to be collated in one place.

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“…[15][16][17][18][19][20], in which the elastoplastic properties of the material are determined from the force-displacement data using a curve-fitting optimisation algorithm. Finite element (FE) analysis technique has been applied cooperatively with inverse methods in many cases [15][16][17][18][19][20]. A review on the essentials of the FE simulation techniques for SPT has been given by Abdendroth [21].…”

Section: Introductionmentioning

confidence: 99%

Determination of creep damage properties from small punch creep tests considering pre-straining effect using an inverse approach

Wei

Jin

Liu

et al. 2019

Mechanics of Materials

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Although the small punch creep test (SPCT) has been commonly accepted as an effective small specimen material characterisation technique (e.g. the European Code of Practice (CoP) for small punch test was produced in 2006 to provide a practical guideline for the experimental work and data interpretation of small punch test), the conversion from the experimental results obtained from the SPCT, i.e. displacement-time data, to the corresponding strain-time data obtained from conventional uniaxial creep tests has not been thoroughly understood due to the complex nature of the deformation and material failure mechanisms involved in the SPCT, e.g. contact mechanism, material nonlinearity, large deformation and initial plasticity damage. The current paper presents an inverse method to determine the creep properties directly from the SPCT experimental results, without converting them to the uniaxial creep test data. A finite element (FE) model taking account of the conventionally overlooked pre-straining effects has been employed for an inverse optimisation method for the first time. The inverse method has been proven to be capable of effectively predicting the creep behaviours of a P91 steel at 600⁰C with a good agreement to the experimental results. Keywordssmall punch creep test; creep damage properties; pre-straining effect; inverse approach Manuscript region of origin Europe

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High-temperature small punch test for mechanical characterization of a nickel-base super alloy

Cited by 18 publications

References 10 publications

High Temperature Deformation Mechanisms in a DLD Nickel Superalloy

High Temperature Deformation Mechanisms in a DLD Nickel Superalloy

Resistance of 3D-Printed Components, Test Specimens and Products to Work under Environmental Conditions—Review

Determination of creep damage properties from small punch creep tests considering pre-straining effect using an inverse approach

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