Identification of the plastic properties of structural steel using spherical indentation

Pham, Thai‐Hoan; Phan, Quang-Minh; Kim, Seung-Eock

doi:10.1016/j.msea.2017.10.097

Cited by 40 publications

(20 citation statements)

References 24 publications

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“…The mechanical properties of the indented material, such as elastic modulus E, yield strength σ y , strain hardening exponent n, and hardness H, can thus be evaluated from these above indentation parameters. Numerous analytical approaches that allow the determining of the mechanical properties from the indentation load-penetration depth curve have been proposed in recent years [17][18][19][20][21]. Among which Oliver and Pharr's method [17] has been considered as one of the most popular methods to extract elastic modulus and hardness of indented material, while the algorithm proposed by Pham et al [21] could be considered as a representative approach for determination of yield strength and The mechanical properties of the indented material, such as elastic modulus E, yield strength y, strain hardening exponent n, and hardness H, can thus be evaluated from these above indentation parameters.…”

Section: Methodsmentioning

confidence: 99%

“…Among which Oliver and Pharr's method [17] has been considered as one of the most popular methods to extract elastic modulus and hardness of indented material, while the algorithm proposed by Pham et al [21] could be considered as a representative approach for determination of yield strength and The mechanical properties of the indented material, such as elastic modulus E, yield strength y, strain hardening exponent n, and hardness H, can thus be evaluated from these above indentation parameters. Numerous analytical approaches that allow the determining of the mechanical properties from the indentation load-penetration depth curve have been proposed in recent years [17][18][19][20][21]. Among which Oliver and Pharr's method [17] has been considered as one of the most popular methods to extract elastic modulus and hardness of indented material, while the algorithm proposed by Pham et al [21] could be considered as a representative approach for determination of yield strength and strain hardening exponent of structural steel.…”

Section: Methodsmentioning

confidence: 99%

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Indentation for investigation of strain rate effect on mechanical properties in structural steel weld zone

Pham

Vinh

Tung

2019

STCE

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In this study, instrumented indentation testing was conducted at room temperature for the investigation of the effect of strain rate on the hardness and yield strength in the weld zone of a commonly used structural steel, SM520. A number of indentation tests were undertaken at a number of strain rate values from 0.02 s −1 to 0.2 s −1 in the weld metal (WM), heat-affected zone (HAZ), and base metal (BM) regions of the weld zone. The mechanical properties including yield strength (σ y ) and hardness (H) in WM, HAZ, and BM were then computed from the applied load-penetration depth curves using a proposed method. As the result, the effects of strain rate indentation on yield strength and hardness in all regions of the weld zone were evaluated. The results displayed that hardness and yield strength in the weld zone's components are influenced on the strain rate, where both hardness and yield strength decrease with the decreasing strain rate.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Indentation for investigation of strain rate effect on mechanical properties in structural steel weld zone

Pham

Vinh

Tung

2019

STCE

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“…Researcher [7] has adopted the use of spherical indenter to figure out the structural characteristics of SS400, SM490 and SM520 using finite element analysis to create a shift of algorithm. The specifications taken under consideration are yield strength (σ y ), the hardening exponent (n), and the ratio (α).…”

Section: Spherical Indentermentioning

confidence: 99%

Comparative Analysis Carried Out on Modern Indentation Techniques for the Measurement of Mechanical Properties: A Review

Rouf¹,

Altaf²,

Malik³

et al. 2021

Post-Transition Metals

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Nowadays many indentation techniques are being commonly employed for determining some mechanical properties (harness, elastic modulus, toughness, etc.) using simple method of measuring the indentation depth. On the basis of measurement of depth of penetration, indentation technique has be classified into major categories i.e. microindentation and nanoindentation. Nanoindentation technique uses indirect method of determining the contact area as the depth of penetration is measured in nanometers, while in conventional indentation the area in contact is measured by elementary measurement of the residual area after the indenter is removed from the specimen. Dynamic hardness is the best result of dynamic indentation which can be expressed as the ratio of energy consumed during a rapid indentation to the volume of indentation. The parameter which are taken into consideration are indentation depth, contact force, contact area, mean contact pressure.

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“…Their model requires only flow curve constants, which can be obtained through a simple compression test, and effective strain distribution, which can be obtained through a finite element (FE) analysis of the cold-forming process. Determining the plastic properties of the structural steel using spherical indentation with a reverse algorithm was studied by Pham et al [6]. Fig.…”

Section: • the Most Important Contribution To The Research Of Indentamentioning

confidence: 99%

Study of Influential Parameters of the Sphere Indentation Used for the Control Function of Material Properties in Forming Operations

Satošek

Valeš

Pepelnjak

2019

SV-JME

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The uncertainties of modern, adaptable sheet metal forming systems are classified into model errors and disturbances. To improve the control of production, disturbances in the forming process need to be reduced. For this purpose, a new data flow system was introduced. It connected the data flow of all influencing material parameters into the “material property control function”. To control on-line the forming production line and acquire necessary material data, an indentation test was implemented. The main parameters to follow in this test are pile-up or sink-in values after the embossing of the ball-shaped tool into the material where the innovative approach of fully anisotropic material description was used. To set-up an optimal indentation test, parametric studies were performed with material data of AW 5754-H22. Finite element simulations were used to evaluate the influences of indenter diameter, contact friction and forming history of used the material. Fully anisotropic material behaviour was considered. Novel to this approach were a) the linking of the linear correlation of pile-up with the indentation depth described by gradient k, and b) the linking of gradient k with different pre-strains by a new power function.

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Identification of the plastic properties of structural steel using spherical indentation

Cited by 40 publications

References 24 publications

Indentation for investigation of strain rate effect on mechanical properties in structural steel weld zone

Indentation for investigation of strain rate effect on mechanical properties in structural steel weld zone

Comparative Analysis Carried Out on Modern Indentation Techniques for the Measurement of Mechanical Properties: A Review

Study of Influential Parameters of the Sphere Indentation Used for the Control Function of Material Properties in Forming Operations

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