Estimation of the mechanical properties of metallic materials by means of the small punch test

García, T.E.; Rodríguez, Celestino; Belzunce, F. J.; Suárez, C

doi:10.1016/j.jallcom.2013.08.009

Cited by 282 publications

(182 citation statements)

References 20 publications

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“…It should be noted that another offset t/10 method is also found in the open literature [4,7].For the present work only two definitions P Y MAO* and P Y t/100 will be analyzed due to these respective load represent the beginning of plasticity [4]. Other authors assume that massive yielding is the right criterion to define the fully plastic behavior [7,12], that is the case of t/10 method. It is also noted that the effect of thickness variation has to be taken into account very carefully because small variations have strong incidence in load change in SPT curve.…”

Section: Relation Of Yield Strength With Spt Resultsmentioning

confidence: 99%

“…Thus, if the puncher has low stiffness the recorded displacement is higher than the travel of the contact point of the indenter with specimen. In order to extract the pure displacement of the contact point a discount of elastic compliance should be done [4,7,10]. For the present work the two direct measurement are studied i)  BOT obtained directly from the extensometer attached and ii)  EXT which represent the recording by the extensometer.…”

Section: Displacement Measurement Methodsmentioning

confidence: 99%

“…Under this approach, the characteristic load P Y that represents the end of first regime (elastic bending) of SPT has been selected to be related with yield strength. This framework started by Mao and Takahashi [8] has been continued in recent studies [5,7] until these times. There are several definitions of P Y and its representativeness for the beginning of plasticity is still under debate.…”

Section: Introductionmentioning

confidence: 90%

“…SPT has been applied in many engineering materials including metallic alloys and composites [5,6,7] to correlate the SPT results with the traditional mechanical properties like tensile, fracture or creep. For that purpose some semiempirical correlations between SPT parameters extracted from load-displacement curve and tensile properties like yield strength, tensile strength and elongation are often reported [4,7,3].…”

Section: Introductionmentioning

confidence: 99%

“…For that purpose some semiempirical correlations between SPT parameters extracted from load-displacement curve and tensile properties like yield strength, tensile strength and elongation are often reported [4,7,3]. Under this approach, the characteristic load P Y that represents the end of first regime (elastic bending) of SPT has been selected to be related with yield strength.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical characterization of PM aluminum composites by small punch test

2018

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In this work Small Punch Test (SPT) was applied to study the mechanical behavior of ultrafine-grained AlAl 2 O 3 metal matrix composites (MMCs) fabricated in situ via powder metallurgy route (HITEMAL ® ). Such MMCs show attractive mechanical properties, enhanced creep performance and increased thermal stability at elevated temperatures, not normally associated with service of conventional Al alloys, even after prolonged high temperature exposure. MMCs fabricated from two powders of different particle size (d 50 = 8.9 and 1.2µm) were evaluated in the present work.SPT was performed at room temperature using disc-shaped specimens of 10 mm in diameter. The effect of the different disc thickness (0.4, 0.5 and 0.6 mm) on the load vs. displacement function was evaluated. The displacements monitored from top and bottom sites of the specimen varied during the course of the test. The discs deformed throughout the test by two plastic stages, typical for ductile materials. The relation between load-displacement and stress-strain tensile curves for both composites was analyzed. A drastic change of mechanical behavior between the green compact of cold pressed material and the hot forged material was detected.New methods of determination of a characteristic load P Y , which represents a transition from elastic to plastic bending regime were presented and discussed. A relationship between P Y and corresponding yield stress was studied for each composite material by a calculation of their respective correlation parameters.

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