Estimating constitutive equation of structural steel using indentation

Pham, Thai‐Hoan; Kim, Jung J.; Kim, Seung-Eock

doi:10.1016/j.ijmecsci.2014.11.007

Cited by 55 publications

(26 citation statements)

References 26 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%

“…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. 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].…”

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%

“…E, υ, E i and υ i are the elastic modulus and Poisson's ratio of the sample and indenter, respectively. For determination of the yield strength, the algorithm proposed by Pham et al [21] that allows extracting yield strength σ y of structural steel was used. In this method, the yield strength σ y in the weld zone can be determined with respect to α using the following polynomial equations [21]:…”

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%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

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

Pham

Vinh

Tung

2019

STCE

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“…Instead, it undergoes a transition process. As shown in figure 1, the constitutive equation of the corresponding material can be represented with the model proposed by Pham [13]. As in equation (1), where the transition part is assumed to be a straight line and is considered the ideal plastic plateau.…”

Section: Materials Model and Dimension Analysis 21 Metal Materials Comentioning

confidence: 99%

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

Deng

Zhao

Wang

2020

Mater. Res. Express

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In this paper, a novel method was proposed to measure the residual stress and plasticity parameters of metal materials with yield plateau through continuous spherical indentation test. The indentation energy was selected as the indentation parameter to establish a dimensionless equation between the residual stress and material parameters through dimensional analysis method. The effects of residual stress and plastic parameters on the indentation response tests are studied, and the dimensionless function expressions are determined respectively when the specimen with or without residual stress based on the finite element analysis data of different residual stress levels. Based on the self-established inverse analysis, the yield strength (s y ), strain hardening exponent (n), ratio coefficient (a) and residual stress (s r ) can be obtained through indentation test. At last, the validation of the method presented in this paper was verified by simulating the material (SS400 and SM490) with the known material parameters.

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Extraction of Flow Behavior and Hall–Petch Parameters Using a Nanoindentation Multiple Sharp Tip Approach

2016

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An appealing idea to material scientists is to characterize the mechanical behavior of materials with minimal experimental effort while guaranteeing highly reliable results. Nanoindentation is a candidate technique to reach this objective. Though it is already a standard method to extract hardness and Young's modulus, the technique is not yet fully exploited. The authors demonstrate on the example of Ni and W, with microstructures ranging from single crystalline to nanocrystalline dimensions, how Hall-Petch parameters and flow curves can be extracted by using four pyramidal tips with varying apex angle. Applying appropriate definitions of indentation stress and strain and considering the indentation size effect, the obtained values coincidence well with literature values determined by uniaxial tests.

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Estimating constitutive equation of structural steel using indentation

Cited by 55 publications

References 26 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

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

Extraction of Flow Behavior and Hall–Petch Parameters Using a Nanoindentation Multiple Sharp Tip Approach

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