Engineering Failure Analysis最新文献_第6页

Experimental characterization and capacity assessment of GFRP retrofitted AAC block masonry GFRP加固AAC砌块砌体的试验表征及承载力评价

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-09 DOI: 10.1016/j.engfailanal.2025.109595

Suraj Malla , Purushotam Dangol , Dipendra Gautam

{"title":"Experimental characterization and capacity assessment of GFRP retrofitted AAC block masonry","authors":"Suraj Malla , Purushotam Dangol , Dipendra Gautam","doi":"10.1016/j.engfailanal.2025.109595","DOIUrl":"10.1016/j.engfailanal.2025.109595","url":null,"abstract":"<div><div>Masonry buildings reflect a suboptimal performance during strong to major earthquakes. Seismic enhancement of masonry buildings is thus instrumental because masonry is still the most dominant structural system adopted to construct residential buildings in many active seismic regions worldwide. The present study performs experimental characterization of autoclaved aerated concrete (AAC) blocks, polymer modified mortar (PMM), AAC prisms, and AAC wall panels to highlight the efficacy of alternative construction material that is gaining increasing attention lately. Compressive strengths of units and prisms as well as shear strength of walls with and without glass fiber reinforced polymer (GFRP) are reported in this paper. The experimentally characterized material properties are also deployed to a code recommended two story case study structure and eigenvalue analysis and capacity assessment through static nonlinear pushover analysis are performed. The effect of aspect ratio is assessed for both with and without GFRP scenarios. The polymer modified mortar is found to be efficient in enhancing the crushing strength of mortar to be used in AAC block masonry. The sum of observations highlights that the introduction of GFRP in a two story building results in the enhancement of the fundamental frequency by at least 16%. Similarly, considerable enhancement in seismic capacity of AAC masonry is possible with the use of GFRP. Furthermore, GFRP is found to be effective in enhancing both compressive strength and shear strength of AAC block masonry with PMM.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109595"},"PeriodicalIF":4.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the load-bearing reliability of a double-layer flexible joint in wide-temperature-range use environment 双层柔性接头在宽温度范围使用环境下的承载可靠性评估

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-09 DOI: 10.1016/j.engfailanal.2025.109585

Wenzhi Liu , Rongtian Yu , Zhiqi Wang , Liqi Gao , Weiguo Li

{"title":"Evaluation of the load-bearing reliability of a double-layer flexible joint in wide-temperature-range use environment","authors":"Wenzhi Liu , Rongtian Yu , Zhiqi Wang , Liqi Gao , Weiguo Li","doi":"10.1016/j.engfailanal.2025.109585","DOIUrl":"10.1016/j.engfailanal.2025.109585","url":null,"abstract":"<div><div>The double-layer flexible joint (DLFJ) is the main component of the solid rocket motor thrust vector control system for transmitting motion and load-bearing. To meet the use requirements under the working pressure of 15 MPa in a wide temperature range between −40 °C and 60 °C, a DLFJ with an installation angle of 90° was designed in this paper. The specimen-elastomer parts (EPs) of the DLFJ composite rubber materials were processed for simulation experiment and mechanical property testing experiments featuring a wide-temperature-range use environment and thereby ensured safe bearing performance. Based on continuum phenomenological theory, the constitutive model parameters that characterize the mechanical properties of composite rubber materials for joint EPs in a wide-temperature-range use environment were calculated, and the constitutive model of the material in different-temperature use environments was established. The system load-bearing swing experiment, and the system finite element model was established. The update Lagrangian structural dynamics finite element calculation method, which couples material nonlinearity, internal contact constraint nonlinearity of the joint, and large deformation geometric nonlinearity, was used to calculate and analyze the influence mechanism of material properties changes on the load-bearing safety performance of DLFJ, and predict the failure temperature and failure mode of the joint. The functional function was determined based on the predicted failure mode. The reliability index method, which corresponds precisely to the functional function, was used to calculate the reliability of the DLFJ structure under continuous variables that are normally distributed in the wide-temperature-range use environment. Finally, the load-bearing reliability of the DLFJ in a wide-temperature-range use environment was preliminarily verified through the stamping swing experiment of the system prototype.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109585"},"PeriodicalIF":4.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on creep behavior of superalloy 617 M using a Wilshire approach 用Wilshire法研究617m高温合金的蠕变行为

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-09 DOI: 10.1016/j.engfailanal.2025.109586

Sajad Hamid, Ratnakar Singh, Ujjwal Prakash

{"title":"A study on creep behavior of superalloy 617 M using a Wilshire approach","authors":"Sajad Hamid, Ratnakar Singh, Ujjwal Prakash","doi":"10.1016/j.engfailanal.2025.109586","DOIUrl":"10.1016/j.engfailanal.2025.109586","url":null,"abstract":"<div><div>Tensile creep tests were performed on forged 617 M alloy. Classical creep characterized by an extended steady-state (secondary stage) is exhibited during creep at 650°C. Formation of dislocation entanglements limit creep elongation (∼1.5 %). In contrast, limited secondary creep and extended tertiary creep was observed in samples tested at 700°C/750°C. All these samples exhibited extensive creep elongation (7 to 25 %). At 272 MPa/700°C, local climb dominates, increasing dislocation length and enhancing dislocation-precipitate interactions. Instability in dislocation structure prevails as outcome of intensified dislocation interactions during short-term creep. During long-term creep at 190 MPa/700°C, significant growth of precipitates and carbides takes place, facilitating dislocation cross-slip and looping which accounts for extended tertiary creep. At 750°C, precipitate instability causes prolonged tertiary creep. Moderate creep strength reduction on increasing the temperature from 650°C to 700°C reflects microstructural stability at 700°C and a sharp drop at 750°C is ascribed to microstructural degradation. Analysis of creep data was carried out using Wilshire approach. Creep activation energy is calculated to be ∼ 259 kJ/mole which is shown to be consistent with activation energy for self-diffusion. The Wilshire equation predicted stresses for creep life of 1,00,000 h to be 130 MPa at 710°C and 101.5 MPa at 750°C.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109586"},"PeriodicalIF":4.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the failure of metro vehicle stone sweeper and dynamic sub-structure analysis method 地铁车辆扫石机故障调查及动力子结构分析方法

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-08 DOI: 10.1016/j.engfailanal.2025.109593

Yang Liu , Jinbao Huang , Ming Zhang , Wenbiao Huo , Xingwen Wu , Zefeng Wen , Yang Luo , Zheng Guan , Zihao Chen

引用次数: 0

Effects of process interruptions on mechanical properties and failure mechanisms of L-PBF Ti-6Al-4V specimens and the restorative role of heat treatment 工艺中断对L-PBF Ti-6Al-4V试样力学性能和失效机制的影响及热处理的恢复作用

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-08 DOI: 10.1016/j.engfailanal.2025.109594

Zhongming Zhuo , Lei Wang , Jian Mao

{"title":"Effects of process interruptions on mechanical properties and failure mechanisms of L-PBF Ti-6Al-4V specimens and the restorative role of heat treatment","authors":"Zhongming Zhuo , Lei Wang , Jian Mao","doi":"10.1016/j.engfailanal.2025.109594","DOIUrl":"10.1016/j.engfailanal.2025.109594","url":null,"abstract":"<div><div>In the field of metal additive manufacturing (AM), laser powder bed fusion (L-PBF) technology is widely employed for the fabrication of complex metal components due to its precision and versatility. However, during the production process, interruptions may frequently occur due to factors such as power outages, insufficient gas flow, or sensor malfunctions. To address potential economic losses, it is crucial to understand the impact of build interruptions on part quality and implement effective measures to resume production. This study investigates the variations in key mechanical properties and fracture mechanisms of Ti-6Al-4V alloy specimens fabricated by L-PBF under interrupted build conditions, and evaluates heat treatment methods to alleviate the detrimental impacts of such interruptions. Our results indicate that build interruptions significantly reduce the strength and toughness of the specimens, while only minimally affecting microstructure and hardness. Fracture site analysis through fractography and cross-sectional examination revealed that all untreated samples failed precisely at the interruption site. The study recommends a cyclic heat treatment method that can successfully enhance fracture performance at the interruption site and recovers the strength and toughness of the specimens to comparable levels with uninterrupted samples.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109594"},"PeriodicalIF":4.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing nickel coatings for water erosion performance: Optimisation of grain size and thickness 设计用于水侵蚀性能的镍涂层：晶粒尺寸和厚度的优化

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-08 DOI: 10.1016/j.engfailanal.2025.109564

Nithin Chandra Gaddavalasa , Arijit Lodh , Andrea Cini , Vinodhen Saaran , Ali Mehmanparast , Andrew Starr , Gustavo M. Castelluccio

引用次数: 0

Failure analysis and rejuvenation heat treatment of a martensitic stainless steel gate valve stem 马氏体不锈钢闸阀阀杆的失效分析和回火热处理

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-07 DOI: 10.1016/j.engfailanal.2025.109591

H.R. Lashgari , M. Asnavandi , Ji Zhang , Yang Liu , Sean Li

{"title":"Failure analysis and rejuvenation heat treatment of a martensitic stainless steel gate valve stem","authors":"H.R. Lashgari , M. Asnavandi , Ji Zhang , Yang Liu , Sean Li","doi":"10.1016/j.engfailanal.2025.109591","DOIUrl":"10.1016/j.engfailanal.2025.109591","url":null,"abstract":"<div><div>The present study investigated the failure of a martensitic stainless steel valve stem, Grade 431, used in a desalination plant. Microstructural analysis revealed the presence of untempered martensite, delta ferrite (δ), and chromium carbides (M<sub>23</sub>C<sub>6</sub>, where M=Cr, Fe) at the grain boundaries adjacent to the fracture surface. These findings indicate improper heat treatment during manufacturing, resulting in a sensitized microstructure. The formation of microgalvanic cells between Cr-rich and Cr-depleted zones led to micropitting and localised attack (near the gland packing/gearbox end) in the sensitized areas, which eventually failed due to overload. The Charpy impact test conducted at ambient temperature yielded values of approximately 10 J, demonstrating significant brittleness in the sensitized microstructure. A rejuvenation heat treatment typical for 431-grade stainless steels (austenitizing at 1020 °C for 1 h, followed by tempering at 600 °C for 2 h) successfully restored the tempered martensitic microstructure, significantly improving corrosion resistance (by approximately 3.5 times). Thermal analysis showed that the microstructure becomes austenitic at approximately 1150 °C, but is unable to dissolve delta ferrite once formed. This was later confirmed by Thermo-Calc simulations, which indicated that the steel solidifies with a high fraction of delta ferrite and/or forms delta ferrite during heat treatment if the temperature is excessive.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109591"},"PeriodicalIF":4.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature-dependence of strengthening and wear mechanisms for GW42K alloy fabricated by wire-arc directed energy deposition 线弧定向能沉积GW42K合金强化磨损机理的温度依赖性

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-07 DOI: 10.1016/j.engfailanal.2025.109590

Qifei Han , Bin Liu , Yueling Guo , Feng Qian , Wenzhe Li , Siyi Peng , Donghai Wang , Longxi Luo , Changmeng Liu

{"title":"Temperature-dependence of strengthening and wear mechanisms for GW42K alloy fabricated by wire-arc directed energy deposition","authors":"Qifei Han , Bin Liu , Yueling Guo , Feng Qian , Wenzhe Li , Siyi Peng , Donghai Wang , Longxi Luo , Changmeng Liu","doi":"10.1016/j.engfailanal.2025.109590","DOIUrl":"10.1016/j.engfailanal.2025.109590","url":null,"abstract":"<div><div>Here, we investigated the microstructure, mechanical properties, and wear performance of Mg-4.6Gd-1.8Y-0.424Zr (wt.%) (GW42K) alloy fabricated using wire-arc directed energy deposition (WA-DED). The results indicate that the grains of the as-deposited alloy are equiaxed. There are many nanoscale β“ phases in the as-deposited alloy because of the cyclic thermal history. As the ambient temperature increases from 20 °C to 200 °C, affected by dynamic recrystallization, some fine grains appeared at the top of the worn sample, which promoted the wear mechanism of the alloy from mild plastic deformation to severe plastic deformation, thereby improving the high-temperature wear resistance of the alloy. After 200 °C/200 h artificial aging, β” precipitates change into β’ precipitates. According to the mechanical performance test at 200 °C, the yield strength of the alloy increases from 105.1 MPa to 161.3 MPa. Especially, the yield strength of the heat-treated alloy at 200 °C is higher than that at 20 °C, with increases of 17.1 %. By analyzing the strengthening mechanism caused by the β’ phase, it was confirmed that these two abnormal high-temperature strength phenomena are caused by the β’ phase. This work reveals the temperature dependence of the strengthening and wear mechanism of WA-DED GW42K alloy, which can provide a reference for the high-temperature application of Mg alloys.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109590"},"PeriodicalIF":4.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grain effect, creep analysis, and machine learning of Sn-3Ag-0.5Cu solder joint of BGA package under thermal shock test BGA封装Sn-3Ag-0.5Cu焊点热冲击试验的晶粒效应、蠕变分析及机器学习

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-07 DOI: 10.1016/j.engfailanal.2025.109588

Weitong Sun , Xinyi Jing , Liqiang Cao , Peng He , Shuye Zhang

{"title":"Grain effect, creep analysis, and machine learning of Sn-3Ag-0.5Cu solder joint of BGA package under thermal shock test","authors":"Weitong Sun , Xinyi Jing , Liqiang Cao , Peng He , Shuye Zhang","doi":"10.1016/j.engfailanal.2025.109588","DOIUrl":"10.1016/j.engfailanal.2025.109588","url":null,"abstract":"<div><div>With the miniaturization trend in microelectronics packaging, solder joints in Ball Grid Array (BGA) are facing escalating reliability challenges under thermal shock. The coupled effects of microstructural evolution and multi-physics interactions on creep behavior remain poorly understood. This study investigated the degradation mechanism and creep behavior of the Sn-3Ag-0.5Cu (SAC305) solder joint in the BGA package under a thermal shock test for high reliability. The results show that the thermal shock test induces significant changes and degradation in microstructure and mechanical performance: the intermetallic compound (IMC) layer progressively thickens with increasing cycles. Recrystallization, which becomes noticeable by 600 numbers of thermal shock, initiates at the solder pad interface and propagates toward the center of the solder joint. Cu<sub>3</sub>Sn precipitates accumulate in recrystallized regions, exacerbating stress concentrations and impairing creep resistance. After 1200 numbers of thermal shock, cracks predominantly form along the IMC/β-Sn interface, driven by stress concentrations resulting from mismatched thermal expansion coefficients and elastic moduli. Nanoindentation tests reveal that creep displacement increases with thermal cycling, and the creep stress index (n) decreases from 7.2 for uncycled joints to 1 after 1200 cycles, indicating a shift from stress-dependent dislocation creep to stress-independent, diffusion-controlled creep.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109588"},"PeriodicalIF":4.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Qualitative evaluation of failure mechanisms of aluminium 6061-T6 cold spray repairs 6061-T6铝冷喷涂修复失效机理定性评价

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-04-07 DOI: 10.1016/j.engfailanal.2025.109581

Sudip Kundu, Konstantinos Stamoulis

引用次数: 0