Deformation behaviour and material properties of austenitic heat-resistant steel X15CrNiSi25-20 subjected to high temperatures and creep

Brnić, Josip; Turkalj, Goran; Čanađija, Marko; Kršćanski, Sanjin; Brčić, Marino; Lanc, Domagoj

doi:10.1016/j.matdes.2014.12.062

Cited by 20 publications

(8 citation statements)

References 19 publications

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“…These parameters are influenced more by the testing temperature than by the applied stresses414243. To calculate the D, p and r parameters in equation (5), it is useful to re-arrange the expression as follows:…”

Section: Resultsmentioning

confidence: 99%

Significantly enhanced creep resistance of low volume fraction in-situ TiBw/Ti6Al4V composites by architectured network reinforcements

Wang

Huang

et al. 2017

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We present a new class of TiBw/Ti6Al4V composites with a network reinforcement architecture that exhibits a significant creep resistance compared to monolithic Ti6Al4V alloys. Creep tests performed at temperatures between 773 K and 923 K and stress range of 100 MPa-300 MPa indicate both a significant improvement of the composites creep resistance due to the network architecture made by the TiB whiskers (TiBw), and a decrease of the steady-state creep rates by augmenting the local volume fractions of TiBw in the network region. The deformation behavior is driven by a diffusion-controlled dislocation climb process. Moreover, the activation energies of these composites are significantly higher than that of Ti6Al4V alloys, indicating a higher creep resistance. The increase of the activation energy can be attributed to the TiBw architecture that severely impedes the movements of dislocation and grain boundary sliding and provides a tailoring of the stress transfer. These micromechanical mechanisms lead to a remarkable improvement of the creep resistance of these networked TiBw/ Ti6Al4V composites featuring the special networked architecture.Titanium alloys, and in particular titanium matrix composites (TMCs) have been evaluated in board range of aerospace, weapons and sports equipment applications 1-3 . The main rationale behind their use is the high strength-to-weight ratio and high corrosion resistance 4,5 . TMCs have also been used to produce composite monofilament lattice structures 6 and composites with carbon fiber reinforcements for nuclear applications 7 . Quite recently TMCs have also been manufactured via selective laser melting for biomedical applications [8][9][10] . Discontinuously reinforced titanium matrix composites (DRTMCs) have also been developed, and some examples of this class of metal matrix composites are TiB/Ti 11 , TiC/Ti-6Al-4V 12 , (TiB + TiC + La 2 O 3 )/Ti 13 and (Ti 5 Si 3 + TiB)/TC4 14 compounds. Among the various reinforcements adopted for DRTMCs, TiB whiskers (TiBw) are considered to be one of the best because of their high strength and good chemical compatibility with the titanium matrix 15 . Recently, Huang et al. 16 have developed a class of TiBw/Ti6Al4V composite with a network microstructure in which the reinforcements have a designed and tailored network-like distribution, instead of a conventional homogeneous one. These composites show superior high-temperature tensile properties over their traditional TMC counterparts.The understanding and tailoring of the creep performance are preconditions for an effective use of TMCs in structural applications at high temperatures 11,[17][18][19] . The creep behavior mechanisms of traditional TMCs with homogeneous reinforcement distributions have been so far extensively investigated 2,17,20,21 . In general a high volume fraction of the reinforcement can increase the creep resistance, but has detrimental consequences on the room-temperature plasticity and deformability of these composites. TMCs tend to exhibit an improved creep resistance co...

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Section: Resultsmentioning

confidence: 99%

Significantly enhanced creep resistance of low volume fraction in-situ TiBw/Ti6Al4V composites by architectured network reinforcements

Wang

Huang

et al. 2017

Sci Rep

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“…It is possible to distinguish two basic groups of failures, namely, pre-existing material failures and failures that can be created during structure life. In this sense, creep means deformation that accumulates with time and it is thermally activated phenomenon, fatigue is failure due to repeated loading and causes fracture, etc., [4,5]. In terms of creep, this phenomenon is commonly defined as a time-dependent inelastic strain under sustained load and elevated temperature [6].…”

Section: Introductionmentioning

confidence: 99%

S235JRC+C Steel Response Analysis Subjected to Uniaxial Stress Tests in the Area of High Temperatures and Material Fatigue

Brnić¹,

Brčić²,

Baloš³

et al. 2021

Sustainability

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Knowledge of the properties and behavior of materials under certain working conditions is the basis for the selection of the proper material for the design of a new structure. This paper deals with experimental investigations of the mechanical properties of unalloyed high quality steel S235JRC + C (1.0122) and its behavior under conditions of high temperatures, creep and mechanical fatigue. The response of the material at high temperatures (20–700 °C) is shown in the form of engineering stress-strain diagrams while that at creep behavior (400–600 °C) is shown in the form of creep curves. Furthermore, based on uniaxial fully reversed mechanical fatigue tests (R=−1), a stress-life (S-N) fatigue diagram has been constructed and the fatigue (endurance) limit of the material is calculated The experimentally determined value of tensile strength at room temperature is 534 MPa. The calculated value of the fatigue limit, also at room temperature, using the modified staircase method and based on the mechanical fatigue tests data, is 202 MPa. With regard to creep resistance, steel 1.0122 can be considered creep-resistant only at a temperature of 400 °C and at an applied stress not exceeding 50% of the yield strength corresponding to this temperature.

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“…Material properties, the features of its machinability as well as numerical analysis of the structure made of the considered material belong to the most important information about both material and structure. In this sense, it is also recommended to get an insight into some investigations not only made by the authors of this work but also by other authors [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. The possibility of the use of the finite element method in the shear stress analysis of the structure made of any of the mentioned materials is presented in [ 24 ].…”

Section: Introductionmentioning

confidence: 94%

Mechanical Properties, Short Time Creep, and Fatigue of an Austenitic Steel

et al. 2016

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The correct choice of a material in the process of structural design is the most important task. This study deals with determining and analyzing the mechanical properties of the material, and the material resistance to short-time creep and fatigue. The material under consideration in this investigation is austenitic stainless steel X6CrNiTi18-10. The results presenting ultimate tensile strength and 0.2 offset yield strength at room and elevated temperatures are displayed in the form of engineering stress-strain diagrams. Besides, the creep behavior of the steel is presented in the form of creep curves. The material is consequently considered to be creep resistant at temperatures of 400 °C and 500 °C when subjected to a stress which is less than 0.9 of the yield strength at the mentioned temperatures. Even when the applied stress at a temperature of 600 °C is less than 0.5 of the yield strength, the steel may be considered as resistant to creep. Cyclic tensile fatigue tests were carried out at stress ratio R = 0.25 using a servo-pulser machine and the results were recorded. The analysis shows that the stress level of 434.33 MPa can be adopted as a fatigue limit. The impact energy was also determined and the fracture toughness assessed.

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Deformation behaviour and material properties of austenitic heat-resistant steel X15CrNiSi25-20 subjected to high temperatures and creep

Cited by 20 publications

References 19 publications

Significantly enhanced creep resistance of low volume fraction in-situ TiBw/Ti6Al4V composites by architectured network reinforcements

Significantly enhanced creep resistance of low volume fraction in-situ TiBw/Ti6Al4V composites by architectured network reinforcements

S235JRC+C Steel Response Analysis Subjected to Uniaxial Stress Tests in the Area of High Temperatures and Material Fatigue

Mechanical Properties, Short Time Creep, and Fatigue of an Austenitic Steel

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