Carbides and borides appear as minor phases in Inconel 100, although the carbon content (0.18%) is relatively high in comparison to other nickel-base superalloys. The material properties of this alloy depend on a numb...Carbides and borides appear as minor phases in Inconel 100, although the carbon content (0.18%) is relatively high in comparison to other nickel-base superalloys. The material properties of this alloy depend on a number of interrelated microstructural parameters, including the volume fraction of γ' to γ, grain size, elemental distribution, and precipitation of carbides and borides. This study presents a characterization and a failure analysis of Inconel 100 samples loaded to fracture at 760℃ and an examination of their fractography. Chemical analysis, optical metallography, SEM and EDS were used for the characterization of the unusual areas of fracture that were found on the samples. The thermodynamic stability of TiC led to the conclusion that the possibility of creating very large, stable mono carbides, especially TiC carbide, during the production process is the reason for the short time to failure obtained in this work.展开更多
Background Knowledge gaps across literature prevent current guidelines from providing the profile of elderly patients most likely to derive benefit fi^om invasive strategy （IS） in non ST-elevation myocardial infarct...Background Knowledge gaps across literature prevent current guidelines from providing the profile of elderly patients most likely to derive benefit fi^om invasive strategy （IS） in non ST-elevation myocardial infarction （NSTEMI）. Furthermore, the benefit of IS in a real-world elderly population with NSTEMI remains unclear. The aims of this study were to determine factors that lead the cardiologist to opt for an IS in elderly patients with NSTEMI, and to assess the impact of IS on the 6-month all-cause mortality. Methods This multicenter prospective study enrolled all consecutive patients aged 〉 75 years old who presented a NSTEMI and were hospitalized in cardiology intensive care unit between February 2014 and February 2015. Patients were compared on the basis of reperfusion strategy （invasive or conservative） and living status at six months, in order to determine multivariate predictors of the realization of an IS and multivariate predictors of 6-month mor- tality. Results A total of 141 patients were included; 87 （62%） underwent an IS. The strongest independent determinants of IS were younger age [odds ratio （OR）： 0.85, 95%-confidence interval （CI）： 0.78-0.92; P 〈 0.001） and lower ＂Cumulative Illness Rating Scale-Geriatric＂ number of categories score （OR： 0.83, 95%CI： 0.73-0.95; P = 0.002）. IS was not significantly associated with 6-month survival （OR： 0.80, 95%CI： 0.27-2.38; P = 0.69）. Conclusions In real-world elderly patients with NSTEMI, younger patients with fewer comorbidities profited more often from an IS. However, IS did not modify 6-month all-cause mortality.展开更多
文摘Carbides and borides appear as minor phases in Inconel 100, although the carbon content (0.18%) is relatively high in comparison to other nickel-base superalloys. The material properties of this alloy depend on a number of interrelated microstructural parameters, including the volume fraction of γ' to γ, grain size, elemental distribution, and precipitation of carbides and borides. This study presents a characterization and a failure analysis of Inconel 100 samples loaded to fracture at 760℃ and an examination of their fractography. Chemical analysis, optical metallography, SEM and EDS were used for the characterization of the unusual areas of fracture that were found on the samples. The thermodynamic stability of TiC led to the conclusion that the possibility of creating very large, stable mono carbides, especially TiC carbide, during the production process is the reason for the short time to failure obtained in this work.
文摘Background Knowledge gaps across literature prevent current guidelines from providing the profile of elderly patients most likely to derive benefit fi^om invasive strategy （IS） in non ST-elevation myocardial infarction （NSTEMI）. Furthermore, the benefit of IS in a real-world elderly population with NSTEMI remains unclear. The aims of this study were to determine factors that lead the cardiologist to opt for an IS in elderly patients with NSTEMI, and to assess the impact of IS on the 6-month all-cause mortality. Methods This multicenter prospective study enrolled all consecutive patients aged 〉 75 years old who presented a NSTEMI and were hospitalized in cardiology intensive care unit between February 2014 and February 2015. Patients were compared on the basis of reperfusion strategy （invasive or conservative） and living status at six months, in order to determine multivariate predictors of the realization of an IS and multivariate predictors of 6-month mor- tality. Results A total of 141 patients were included; 87 （62%） underwent an IS. The strongest independent determinants of IS were younger age [odds ratio （OR）： 0.85, 95%-confidence interval （CI）： 0.78-0.92; P 〈 0.001） and lower ＂Cumulative Illness Rating Scale-Geriatric＂ number of categories score （OR： 0.83, 95%CI： 0.73-0.95; P = 0.002）. IS was not significantly associated with 6-month survival （OR： 0.80, 95%CI： 0.27-2.38; P = 0.69）. Conclusions In real-world elderly patients with NSTEMI, younger patients with fewer comorbidities profited more often from an IS. However, IS did not modify 6-month all-cause mortality.
