International Journal of Fatigue最新文献_第3页

Fatigue life and performance evaluation of wearable flexible thermoelectric devices under thermomechanical loads

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-08 DOI: 10.1016/j.ijfatigue.2025.108861

Shifa Fan , Yuanwen Gao , Zhiqiang Li

{"title":"Fatigue life and performance evaluation of wearable flexible thermoelectric devices under thermomechanical loads","authors":"Shifa Fan , Yuanwen Gao , Zhiqiang Li","doi":"10.1016/j.ijfatigue.2025.108861","DOIUrl":"10.1016/j.ijfatigue.2025.108861","url":null,"abstract":"<div><div>Wearable flexible thermoelectric generators (WFTEGs) offer a promising solution for integrating power sources with electronics in wearable technologies. However, the longevity of these devices is compromised by fatigue propagation in brittle thermoelectric materials due to internal cracks. This study presents a three-dimensional (3D) numerical model of WFTEGs with through-thickness cracks, accounting for body heat and thermal contact resistance. The effects of flexible substrate thickness, heat sink convection coefficient, and bending radius on the output power density, conversion efficiency, and fatigue life of WFTEGs are comprehensively examined. The results reveal that although increased body heat enhances thermoelectric performance, it simultaneously reduces fatigue life. Removing the cold-end flexible substrate and utilizing an efficient heat sink can improve both thermoelectric performance and fatigue life. Interestingly, the fatigue life initially decreases but then increases as the bending radius decreases, which is attributed to the crack closure effect on fatigue crack propagation. To prevent accelerated fatigue and optimize device durability, environments with a bending radius of approximately 14.33 mm should be avoided. These findings provide valuable insights into the structural optimization of WFTEGs, ensuring their long-term reliability and safety.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108861"},"PeriodicalIF":5.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue notch sensitivity of laser direct energy deposited versus wrought Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy 激光直接能量沉积与锻造 Ti-6.5Al-3.5Mo-1.5Zr-0.3Si 合金的疲劳缺口敏感性比较

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-08 DOI: 10.1016/j.ijfatigue.2025.108869

Jun Cao , Feixiang Weng , Shuquan Zhang , Huaming Wang , Jikui Zhang

{"title":"Fatigue notch sensitivity of laser direct energy deposited versus wrought Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy","authors":"Jun Cao , Feixiang Weng , Shuquan Zhang , Huaming Wang , Jikui Zhang","doi":"10.1016/j.ijfatigue.2025.108869","DOIUrl":"10.1016/j.ijfatigue.2025.108869","url":null,"abstract":"<div><div>The notch, such as hole and chamfer, is unavoidable for aircraft structural components. Stress concentration induced by notch is the leading cause of fatigue failure. It is significant for structural integrity and safety assessment to clarify the intrinsic mechanism causing the difference in fatigue notch sensitivity. The notch fatigue fracture behavior of TC11 samples, fabricated by laser direct energy deposited (LDED) and wrought processes, is studied by high cycle fatigue (HCF) tests, fracture morphology, systematic microstructural characterizations, and theoretical analysis. HCF test results show that the notch fatigue performance of LDED samples reported in this study is superior to that of the wrought ones. The modified critical radius calculated from the equivalent material concept and average strain energy density criterion correlates well with fatigue notch sensitivity <em>q</em> and notch fatigue performance. The thick lamellar <em>α</em> phase produces more crack resistance and higher local plasticity around the notch root, causing lower <em>q</em> of LDED samples. Besides, the difference in <em>q</em> caused by build orientations is attributed to the variations in the angle between the c-axis of the fiber texture and load direction, the dominant slip system, the boundaries between soft and hard grains, and the presence of prior <em>β</em> grain boundaries.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108869"},"PeriodicalIF":5.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-cycle fatigue properties of hot-rolled bonding titanium-clad bimetallic steel

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108865

Huiyong Ban , Chenyang Huang , Yongjiu Shi , Letian Hai

{"title":"High-cycle fatigue properties of hot-rolled bonding titanium-clad bimetallic steel","authors":"Huiyong Ban , Chenyang Huang , Yongjiu Shi , Letian Hai","doi":"10.1016/j.ijfatigue.2025.108865","DOIUrl":"10.1016/j.ijfatigue.2025.108865","url":null,"abstract":"<div><div>The corrosive marine environment brings significant challenges to traditional steel materials, prompting the exploration of alternative solutions in terms of advanced structural materials, such as titanium-clad (TC) bimetallic steel. This paper presents an experimental investigation into the basic mechanical properties and high-cycle fatigue behaviour of hot-rolled bonding TC bimetallic steels with different clad ratios and surface roughness. Based on a series of tensile coupon tests, bonding interface shear tests, combine tests, and high-cycle fatigue tests, the failure modes, static strengths of base metal and bonding interface as well as fatigue lives are clarified, and experimental <em>S-N</em> curves of the TC bimetallic steel are obtained and analysed by comparing with those of titanium alloys and conventional structural steels. SEM images are taken and studied to provide insights into fatigue crack propagation mechanisms. Additionally, the effects of clad ratio and surface roughness on fatigue performance are also elucidated. Finally, the paper proposes a reliable design <em>S-N</em> curve with a fatigue strength of 321.7 MPa for the hot-rolled bonding TC bimetallic steel. The research outcomes may contribute to predicting fatigue strength for TC bimetallic steel, and offer valuable insights for structural engineering applications of such advanced bimetallic steel.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108865"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isothermal and thermomechanical fatigue of 316H stainless steel: Damage mechanism and life prediction

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108863

Jingyu Yang , Yiming Zheng , Fang Wang , Kang Wang , Xi Yuan , Xu Chen , Bingbing Li

{"title":"Isothermal and thermomechanical fatigue of 316H stainless steel: Damage mechanism and life prediction","authors":"Jingyu Yang , Yiming Zheng , Fang Wang , Kang Wang , Xi Yuan , Xu Chen , Bingbing Li","doi":"10.1016/j.ijfatigue.2025.108863","DOIUrl":"10.1016/j.ijfatigue.2025.108863","url":null,"abstract":"<div><div>In-phase and out-of-phase thermomechanical fatigue (TMF) tests with the temperature cycling from 300 °C to 650 °C were carried out on 316H stainless steel. The isothermal fatigue (IF) tests at 650 °C were performed for comparison. A wide range of strain amplitudes from 0.185 % to 1.0 % were used. Results showed that TMF loading resulted in the more pronounced cyclic hardening than IF loading, and the phenomenon of stress relaxation was observed only in TMF tests. In IF tests, the material quickly reached stress stabilization after a short initial hardening stage. The damage mechanism was revealed through a comprehensive microscopic characterization. It was found that in TMF tests, the coupling effect of thermal and mechanical loads caused additional intergranular damage, leading to the marked intergranular cracking on fracture surface. The intergranular crack initiation and the incipient intergranular crack propagation in IF tests were primarily ascribed to the more severe oxidation damage. The followed crack growth was dominated by transgranular mode. The sequence of cyclic life under different loading modes was, IF < IP-TMF < OP-TMF. In order to incorporate the effects of temperature cycling, a temperature correction term was introduced to the Zamrik model. The modified model showed satisfactory prediction results for both IF and TMF tests.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"194 ","pages":"Article 108863"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A modified fatigue life prediction model considering residual stresses relaxation and microhardness distribution for surface strengthening materials

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108862

Ling Ju , Kai-Shang Li , Lv-Yi Cheng , Hang-Hang Gu , Run-Zi Wang , Xian-Cheng Zhang , Shan-Tung Tu

{"title":"A modified fatigue life prediction model considering residual stresses relaxation and microhardness distribution for surface strengthening materials","authors":"Ling Ju , Kai-Shang Li , Lv-Yi Cheng , Hang-Hang Gu , Run-Zi Wang , Xian-Cheng Zhang , Shan-Tung Tu","doi":"10.1016/j.ijfatigue.2025.108862","DOIUrl":"10.1016/j.ijfatigue.2025.108862","url":null,"abstract":"<div><div>In this paper, a fatigue life prediction model of surface strengthening materials is proposed by considering dominant surface integrity parameters. The maximum residual stress and maximum microhardness of the surface strengthening materials are determined as the dominant parameters for the development of fatigue life prediction model according to the correlation analysis between surface integrity parameters and fatigue life. Firstly, an existing residual stress relaxation model is modified to characterize the relaxation process of residual stress with the number of cycles. Subsequently, a real applied stress on surface strengthening specimens is calculated by considering the effect of residual stress on the mean stress. The fatigue damage each cycle under the real applied stress that varies with cycles is calculated by introducing a correction factor related to the maximum microhardness. Finally, the fatigue life is predicted with the help of linear damage accumulation according to Miner’s rule. The developed model is verified on shot peened SS304, deep rolled TC4 and ultrasonic surface rolled TC4, exhibiting a good agreement with experimental results.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108862"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on fatigue properties of polyamide 6 modified carbon fiber reinforced composites

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108860

Na Zhang , Yunguo Fu , Wenzheng Jiang , Yukang Sun , Zheng Zhang , Deming Zhao , Shengye Li , Chengrui Di , Kun Qiao

{"title":"Study on fatigue properties of polyamide 6 modified carbon fiber reinforced composites","authors":"Na Zhang , Yunguo Fu , Wenzheng Jiang , Yukang Sun , Zheng Zhang , Deming Zhao , Shengye Li , Chengrui Di , Kun Qiao","doi":"10.1016/j.ijfatigue.2025.108860","DOIUrl":"10.1016/j.ijfatigue.2025.108860","url":null,"abstract":"<div><div>The incorporation of a toughening agent in the production of Carbon Fiber Reinforced Polymer (CFRP) can mitigate crack propagation inside the matrix, which is significant for enhancing the product’s fatigue life. This study presents the preparation of T300 carbon fiber reinforced epoxy resin composite utilizing a wet toughening process, incorporating the thermoplastic monomer Polyamide 6 (PA6) into the epoxy resin (EP). The impact of toughening modification on the mechanical characteristics of CFRP was examined. Tensile, three-point bending, interlaminar shear, and impact tests were conducted on the fabricated CFRP unidirectional laminates. The tensile fatigue characteristics of the laminates were evaluated, and the microscopic mechanism was examined using SEM. The performance degradation model, grounded in conventional progressive damage theory, is enhanced, and finite element fatigue analysis of CFRP laminates is conducted and validated by experiments. The findings indicate that the CFRP produced using the blending and toughening technique has superior fatigue properties. The preparation process of the blending approach is straightforward, and it has a more pronounced impact on life enhancement under high cycle fatigue. The enhanced performance degradation model and finite element fatigue analysis corroborate the outcomes of blending change, hence broadening the use of composite materials.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108860"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on shear fatigue damage behavior and evolution of Fe-Pb thin walled heterogeneous welded material components under hot isostatic pressure

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108867

Siyuan Ding , Jianhua Liu , Jinfang Peng , Hechang Li , Bo Li , Minhao Zhu

{"title":"Study on shear fatigue damage behavior and evolution of Fe-Pb thin walled heterogeneous welded material components under hot isostatic pressure","authors":"Siyuan Ding , Jianhua Liu , Jinfang Peng , Hechang Li , Bo Li , Minhao Zhu","doi":"10.1016/j.ijfatigue.2025.108867","DOIUrl":"10.1016/j.ijfatigue.2025.108867","url":null,"abstract":"<div><div>For the first time, 45 steel and Pb were welded to form Fe-Pb thin-walled heterogeneous welding material components, which can be used in heavy-duty and radiation resistant environments. This study conducted comparative shear fatigue tests under different alternating loads under the conditions of hot isostatic pressing (HIP) control technology. The experimental results are as follows: after HIP treatment, there was a significant preference for grain orientation and an increase in grain size in the specimen. At the same time, the fatigue failure mechanism of Fe-Pb thin-walled heterogeneous components changed from brittle of cleavage fracture to quasi cleavage fracture of ductile–brittle mixture. Meanwhile, the cracking mechanism of Fe-Pb thin-walled heterogeneous Welded material components under without HIP and HIP conditions has been revealed. A mapping relationship failure model was established for grain size, grain orientation and distribution, dislocation configuration evolution, and fatigue life. The research results provide effective theoretical support for the fatigue damage behavior of Fe-Pb thin-walled heterogeneous welded material components.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"194 ","pages":"Article 108867"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dwell-fatigue behaviour of additively manufactured Ti6242 alloy via LPBF and HIPPING

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108864

Atasi Ghosh , Saem Ahmed , Sureddy Tejanath Reddy , Gyan Shankar

{"title":"Dwell-fatigue behaviour of additively manufactured Ti6242 alloy via LPBF and HIPPING","authors":"Atasi Ghosh , Saem Ahmed , Sureddy Tejanath Reddy , Gyan Shankar","doi":"10.1016/j.ijfatigue.2025.108864","DOIUrl":"10.1016/j.ijfatigue.2025.108864","url":null,"abstract":"<div><div>Ambient-temperature, low-cycle dwellfatigue, conventional low-cycle fatigueand creeptests have beenperformed on additively manufactured and Hot Isostatic Pressed (HIPPED) Ti-6Al-2Sn-4Zr-2Moalloy.The low-cycle dwellfatigue life comparedwith the low-cycle fatiguelife showed a dwell debit of 5. The factor decrease in thelow-cycle dwellfatiguelifefrom the low-cycle fatiguelife remain almost same withdecreasing peak stress for 120 s dwell time. Key findings indicate that the Laser Powder Bed Fusion process induces an inherent anisotropy and heterogeneity in the microstructure, which, while mitigated by HIPPING, still influences fatigue resistance under dwell loading.The combination of refined microstructure and residual stress relief from HIPPING resulted in improved dwell fatigue performance, though certain microstructural features, such as columnar grains in the as-built condition, contributed to premature crack initiation sites under cyclic loading.The simulated dwell fatigue behaviour based on the Andrade model indicates there is a three-fold increase in the Andrade coefficient with respect to the creep behaviour. The appreciably high dwell sensitivity has been attributed to higher strain rate sensitivity and low strain hardening coefficient which causes significant cyclic softening of the microstructure generated via LPBF + HIPPING of Ti-6242 alloy.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108864"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cyclic deformation behavior of medium-manganese transformation-induced plasticity steel at elevated temperatures: Mechanical tests and microstructural characterization

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-07 DOI: 10.1016/j.ijfatigue.2025.108866

Juan Zhang , Zhicheng Song , Zongxi Wu , Xingmin Huang , Qianhua Kan

{"title":"Cyclic deformation behavior of medium-manganese transformation-induced plasticity steel at elevated temperatures: Mechanical tests and microstructural characterization","authors":"Juan Zhang , Zhicheng Song , Zongxi Wu , Xingmin Huang , Qianhua Kan","doi":"10.1016/j.ijfatigue.2025.108866","DOIUrl":"10.1016/j.ijfatigue.2025.108866","url":null,"abstract":"<div><div>Medium-manganese transformation-induced plasticity (TRIP) steel, a new generation advanced high-strength steel, exhibits a combination of excellent strength and plasticity. Due to the TRIP effect, the cyclic deformation behavior and mechanisms of the steel are more complicated, especially at elevated temperatures. In this work, the monotonic and cyclic deformation of Fe-0.4C-7Mn-3.2Al steel were investigated at elevated temperatures, based on the previous experiments at room temperature. The influence of temperature on cyclic deformation characteristics and mechanisms were revealed by mechanical tests and multi-scale microstructural characterization. At 200 °C, the material exhibited cyclic stability under symmetric strain-controlled loading. Under asymmetric stress-controlled loading, it behaved steady ratchetting evolution under lower and medium stress amplitudes and significantly accelerated ratchetting evolution under higher stress amplitudes. The deformation mechanism at room temperature and 200 °C involved the coordination of dislocation slip and phase transformation. At 300 °C, the cyclic deformation characteristics of the material differed significantly from that at 200 °C. The cyclic hardening was observed under symmetric strain-controlled loading. Under asymmetric stress-controlled loading, the ratchetting strain rapidly got into shakedown after a few cycles under various stress amplitudes. The deformation mechanism at 300 °C was dominated by dislocation slip under dynamic strain aging.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"195 ","pages":"Article 108866"},"PeriodicalIF":5.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The coupling effects of oxidation and temperature on the low cycle fatigue deformation behavior of CM 247 DS LC alloy

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-06 DOI: 10.1016/j.ijfatigue.2025.108858

S. Chandra , N. Paulose , R.K. Rai

{"title":"The coupling effects of oxidation and temperature on the low cycle fatigue deformation behavior of CM 247 DS LC alloy","authors":"S. Chandra , N. Paulose , R.K. Rai","doi":"10.1016/j.ijfatigue.2025.108858","DOIUrl":"10.1016/j.ijfatigue.2025.108858","url":null,"abstract":"<div><div>The role of environmental degradation, particularly oxidation, on the low cycle fatigue response of rotating blades of aero-engine operating at significantly high temperatures is extremely important as it adversely affects its performance. The present work investigates the coupling effect of prior cyclic oxidation and temperature on the low cycle fatigue (LCF) fatigue behaviour of CM 247 DS LC Ni-based superalloy. The LCF tests were performed on both as-received and pre-oxidized specimens at design significant temperatures, i.e., 750 and 850 °C at a strain ratio of 0. The oxidation damage was induced by pre-cyclic thermal exposures at 850 °C for 500 h. The prior oxidized test specimens tended to have lower fatigue lives compared to the as-received test pieces. The nickel oxide, alumina, chromia scales, and alumina-rich intrusions formed during prior oxidation are vulnerable to cracking under low-cycle fatigue (LCF) loading, leading to rapid crack initiation and a corresponding reduction in LCF life. The deterioration of fatigue performance of the prior-oxidized samples is attributed to the formation of a weaker precipitate free zones zone, which effectively introduce the strain incompatibility and cracking the oxide scales.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"194 ","pages":"Article 108858"},"PeriodicalIF":5.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0