Analysis on stress‐strain behavior and life prediction of P92 steel under creep‐fatigue interaction conditions

Published on Sep 14, 2020in Fatigue & Fracture of Engineering Materials & Structures3.459
· DOI :10.1111/FFE.13341
Lei Zhao25
Estimated H-index: 25
(TJU: Tianjin University),
Lianyong Xu26
Estimated H-index: 26
(TJU: Tianjin University)
+ 1 AuthorsHongyang Jing26
Estimated H-index: 26
(TJU: Tianjin University)
Source
Abstract
References59
Newest
#1Xiaoan Hu (Nanchang Hangkong University)H-Index: 1
#2Qiang Zhang (Nanchang Hangkong University)H-Index: 1
Last. XiangFan NieH-Index: 1
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Abstract In this paper, the creep-fatigue behavior of directionally solidified superalloy DZ125 has been investigated by stress-controlled experiments at high temperatures with different dwell times. The endurance life(i.e Cumulated dwell time) has shown consistent changing trend with different load conditions. Crack growth form and creep-fatigue interaction are analyzed on the basis of microscope observation results. A new continuum damage mechanics(CDM) model is proposed and the damage behavio...
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#1Haizhou Li (TJU: Tianjin University)H-Index: 8
#2Hongyang Jing (TJU: Tianjin University)H-Index: 26
Last. Zhengxin Tang (TJU: Tianjin University)H-Index: 9
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Abstract Cyclic deformation mechanism of Sanicro 25 alloy was investigated under different strain rates ( e ˙ ) at 700 °C. When e ˙ increased, the maximum stress amplitude σ a decreased and the fatigue life N f increased. The saturated hysteresis energy Δ W p first decreased and then increased with increasing e ˙ . It is attributed to the variation of stress amplitude, which is related to the interaction of precipitates and dislocations. HAADF STEM analysis shows that the Cr23C6 precipitates wer...
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#1Wei Zhang (UT: University of Tennessee)H-Index: 109
#2Xue Wang (UT: University of Tennessee)H-Index: 5
Last. Zhili Feng (ORNL: Oak Ridge National Laboratory)H-Index: 35
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Abstract Creep strength enhanced ferritic (CSEF) steels containing 9-12wt% chromium have been extensively used in fossil-fuel-fired power plants. Despite their excellent creep resistance at high temperatures, premature failures (especially Type IV cracking) are often found in the fine-grained heat affected zone (HAZ) or intercritical HAZ of the welded components. This failure mode is preceded by the strain localization in the HAZ, as measured by the Digital Image Correlation (DIC) technique. The...
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#1Yanwei Dai (Beijing University of Technology)H-Index: 8
#2Yinghua Liu (THU: Tsinghua University)H-Index: 19
Last. Haofeng Chen (University of Strathclyde)H-Index: 18
view all 5 authors...
Abstract Due to the potential influence of constraint effect on failure assessment, a link is needed to bridge the constraint effect characterized by higher order term asymptotic solution and time dependent failure assessment diagram (TDFAD). In this paper, a modification method for creep toughness incorporating C(t)-A2(t) theory is proposed based on Nikbin-Smith-Webster model. The relation between Q-term and A2(t)-term is also presented for creep crack. Results show that the creep toughness can...
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#1Wei Zhang (UT: University of Tennessee)H-Index: 109
#2Xue Wang (UT: University of Tennessee)H-Index: 5
Last. Zhili Feng (ORNL: Oak Ridge National Laboratory)H-Index: 35
view all 6 authors...
Abstract The creep rupture behavior (Type IV failure) for weldments of creep strength enhanced ferritic steel is numerically analyzed, using an integrated microstructure- and micromechanics-based finite element model. To account for the large microstructure gradients across weldments, a two-dimensional digital microstructure is constructed based on the actual observed microstructure of ferritic steel weldment by using the Voronoi-tessellation method. According to the fracture mechanism studies a...
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#1Mesay Alemu Tolcha (JU: Jimma University)H-Index: 4
#2Holm Altenbach (Otto-von-Guericke University Magdeburg)H-Index: 39
Last. Getachew Shunki TibbaH-Index: 3
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Abstract In hot milling process, rolling die is subjected to nonsteady conditions which can raise the combinations of fatigue and creep damage mechanism. Creep-fatigue interaction at elevated temperatures is complex research topic; as a result, prediction of failure due to creep-fatigue interaction is important subjects to assess rolling die life. Because the accuracy and consistency of models developed in this area show a large variation due to the considered parameters, conditions and assumpti...
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#1Wei Wang (CAS: Chinese Academy of Sciences)H-Index: 16
#2Chunjing Li (CAS: Chinese Academy of Sciences)H-Index: 14
Last. Fang Wang (CAS: Chinese Academy of Sciences)H-Index: 1
view all 4 authors...
Abstract Thermal aging experiment is an effective method to evaluate the thermostability of structure materials which serve in high temperatures. But it difficult to acquire the aging data throughout service term, because it would take a long time. Hence, an accelerating thermal aging model of China low activation martensitic (CLAM) steel was built in this paper to shorten the time of the thermal aging experiment. The microstructure analysis and Charpy impact tests were conducted on CLAM steel a...
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#1Xiaozhao Li (Beijing University of Civil Engineering and Architecture)H-Index: 1
#2Chengzhi Qi (Beijing University of Civil Engineering and Architecture)H-Index: 1
Last. Pengchong Zhang (Beijing University of Civil Engineering and Architecture)H-Index: 1
view all 3 authors...
Abstract Fatigue properties under cyclic static compressive loading and unloading (i.e., compressive fatigue/cyclic creep properties) have an important meaning for evaluation of lifetime in brittle solids containing numerous microcracks. The total deformation during cyclic static compression consists of time-independent elastic, time-dependent viscoelastic, time-dependent viscoplastic and time-independent plastic deformations. In this study, the viscoplastic and plastic deformations are collecti...
Source
#1Lei Zhao (TJU: Tianjin University)H-Index: 25
#2Kai Song (TJU: Tianjin University)H-Index: 4
Last. Haizhou Li (TJU: Tianjin University)H-Index: 8
view all 7 authors...
Abstract In this study, creep properties and fracture behaviors ranging from 400 to 450 N in small punch creep (SPC) tests at 700 °C and 725 °C were evaluated by experiment and simulation for Sanicro25 alloy. The similar creep performances were obtained experimentally in both SPC tests and uniaxial creep (UC) tests, and the correlation between loads in SPC tests and stresses in UC tests at different temperatures was determined. In addition, different crack growth patterns which gradually changed...
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#1Lu-Kai Song (Beihang University)H-Index: 8
#2Guang-Chen Bai (Beihang University)H-Index: 17
Last. Cheng-Wei Fei (Fudan University)H-Index: 23
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Abstract To improve the modeling accuracy and simulation efficiency of probabilistic creep-fatigue life evaluation, a decomposed collaborative time-variant Kriging surrogate model (DCTKS) is proposed by absorbing the strengths of extremum selection technique and Kriging model into decomposed collaborative strategy. The probabilistic creep-fatigue life evaluation of a typical turbine disk is considered as one case to evaluate the proposed DCTKS method with respect to fluctuation of transient load...
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Cited By4
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To understand the premature-fracture mechanisms of long-term service damage of an advanced alloy’s (Chinese P92 steel) welded joint, the creep-fatigue (CF) experiments with holding times of 30, 120, 300, 600 and 900 s were individually performed at 923 K. The cyclic softening, inelastic-strain amplitudes and stress-relaxation behaviors were compared between welded and base-metal (BM) specimens. From the results, the failure stage of the welded specimens occupies 45% of the lifetime fraction, whi...
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#1Biao DingH-Index: 5
#2Weili RenH-Index: 19
Last. Jianbo YuH-Index: 11
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Abstract The creep-fatigue interactions on the long-term service damage of P92 welded joint were investigated on the tensile and compressive holdings with a series of applied strains, respectively. The local mechanical properties including hardness, elastic modulus and creep resistance of welded joint were uncovered using nanoindentation. The features of fracture morphology and internal defects after CF tests were studied by scanning electron microscope. Based on the characteristic of microstruc...
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#1Maureen Mudang (UTM: Universiti Teknologi Malaysia)H-Index: 4
#2Esah Hamzah (UTM: Universiti Teknologi Malaysia)H-Index: 28
Last. Filippo Berto (NTNU: Norwegian University of Science and Technology)H-Index: 69
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