Cyclic hardness test PHYBALCHT – Short-time procedure to evaluate fatigue properties of metallic materials

Kramer, Hendrik; Starke, Peter; Klein, Marcus; Eifler, Dietmar

doi:10.1016/j.ijfatigue.2014.01.009

Cited by 52 publications

(75 citation statements)

References 13 publications

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“…Up from the second cycle, the load-indentation depth-relation forms a hysteresis loop. The half width of the hysteresis at the mean load was determined as the plastic indentation The cyclic hardening potential of the differently manufactured microstructures has been determined by the PhyBaL CHT method similar to the work of Kramer et al [33]. Cyclic microindentation tests were conducted using a Vickers indenter on a planar material surface at 20 different positions in the middle of the cross-sections of the fatigue specimen shafts and were performed at two different samples, resulting in values, which differed less than 5%.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The sum of both power laws describes the whole h a,p -N-relation. Due to the fact that h a,p II is part of both power laws and that after the 4th cycle, significant macroplastic deformation processes are mainly completed, indicated by the slope change of the h a,p -N-curve, the exponent of the second power law can be considered representative for the cyclic behavior of the material [33]. The exponent of the power law describes the hardening potential of the material and is called cyclic hardening exponent CHT e II [33].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Figure 3. PhyBaLCHT: the schematic description of (a) the indentation force-indentation depthhysteresis loop and (b) the ha,p-N-curves described by two power laws according to Reference [33].…”

Section: Experimental Methodsmentioning

confidence: 99%

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An Investigation of the Microstructure and Fatigue Behavior of Additively Manufactured AISI 316L Stainless Steel with Regard to the Influence of Heat Treatment

Blinn

Klein

Gläßner

et al. 2018

Metals

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Abstract:To exploit the whole potential of Additive Manufacturing, it is essential to investigate the complex relationships between Additive Manufacturing processes, the resulting microstructure, and mechanical properties of the materials and components. In the present work, Selective Laser Melted (SLM) (process category: powder bed fusion), Laser Deposition Welded (LDW) (process category: direct energy deposition) and, for comparison, Continuous Casted and then hot and cold drawn (CC) austenitic stainless steel AISI 316L blanks were investigated with regard to their microstructure and mechanical properties. To exclude the influence of surface topography and focus the investigation on the volume microstructure, the blanks were turned into final geometry of specimens. The additively manufactured (AM-) blanks were manufactured in both the horizontal and vertical building directions. In the horizontally built specimens, the layer planes are perpendicular and in vertical building direction, they are parallel to the load axis of the specimens. The materials from different manufacturing processes exhibit different chemical composition and hence, austenite stability. Additionally, all types of blanks were heat treated (2 h, 1070 • C, H 2 O) and the influence of the heat treatment on the properties of differently manufactured materials were investigated. From the cyclic deformation curves obtained in the load increase tests, the anisotropic fatigue behavior of the AM-specimens could be detected with only one specimen in each building direction for the different Additive Manufacturing processes, which could be confirmed by constant amplitude tests. The results showed higher fatigue strength for horizontally built specimens compared to the vertical building direction. Furthermore, the constant amplitude tests show that the austenite stability influences the fatigue behavior of differently manufactured 316L. Using load increase tests as an efficient rating method of the anisotropic fatigue behavior, the influence of the heat treatment on anisotropy could be determined with a small number of specimens. These investigations showed no significant influence of the heat treatment on the anisotropic behavior of the AM-specimens.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

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An Investigation of the Microstructure and Fatigue Behavior of Additively Manufactured AISI 316L Stainless Steel with Regard to the Influence of Heat Treatment

Blinn

Klein

Gläßner

et al. 2018

Metals

Self Cite

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show abstract

“…Cyclic nanoindention will be carried out to provide a short-time characterization for the material properties of fatigue [26]. [26].…”

Section: Determination Of Descriptors and Materials Propertiesmentioning

confidence: 99%

“…[26]. Da die Nanoindentierung eine zeitaufwendige Vorbereitung der Proben erfordert (Halbierung und Schleifen), ersetzen wir die einfache und die zyklische Nanoinden- For personal use only.…”

Section: Determination Of Descriptors and Materials Propertiesunclassified

High-Throughput Exploration of Evolutionary Structural Materials

Ellendt

Mädler

2018

HTM Journal of Heat Treatment and Materials

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Abstract/KurzfassungWhile experimental high-throughput and computational methods exist for the development of functional materials, structural materials are still being developed on the base of experience, stepwise prediction and punctual support of computational models. As a result, many major breakthroughs have been and still are achieved by coincidence under non-intuitive conditions. Experimental high throughput methods allow to explore large process windows where no prediction is possible due to lack of existent data. This work proposes the high throughput method "Farbige Zustände" as a novel approach for the experimental exploration of structural materials. New methods for sample synthesis, treatment and characterization are developed as well as computational methods for ad-hoc data analysis, search and experiment planning. n

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Cyclic Hardness Test PHYBALCHT: A New Short‐Time Procedure to Estimate Fatigue Properties of Metallic Materials

Kramer¹,

Klein²,

Eitler³

2015

Characterization of Minerals, Metals, and Materials 2015

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Cyclic hardness test PHYBALCHT – Short-time procedure to evaluate fatigue properties of metallic materials

Cited by 52 publications

References 13 publications

An Investigation of the Microstructure and Fatigue Behavior of Additively Manufactured AISI 316L Stainless Steel with Regard to the Influence of Heat Treatment

An Investigation of the Microstructure and Fatigue Behavior of Additively Manufactured AISI 316L Stainless Steel with Regard to the Influence of Heat Treatment

High-Throughput Exploration of Evolutionary Structural Materials

Cyclic Hardness Test PHYBALCHT: A New Short‐Time Procedure to Estimate Fatigue Properties of Metallic Materials

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