scholarly journals Thermal Diffusivity Measurement of Laser-Deposited AISI H13 Tool Steel and Impact on Cooling Performance of Hot Stamping Tools

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 154 ◽  
Author(s):  
Jon Iñaki Arrizubieta ◽  
Magdalena Cortina ◽  
Arantza Mendioroz ◽  
Agustín Salazar ◽  
Aitzol Lamikiz
Keyword(s):  
Thermal Diffusivity ◽  
Hot Stamping ◽  
Reference Value ◽  
Added Value ◽  
Additive Process ◽  
Effective Thermal Diffusivity ◽  
Thermal Diffusivity Measurement ◽  
Aisi H13 ◽  
The Impact ◽  
Aisi H13 Tool Steel

Additive manufacturing is a technology that enables the repair and coating of high-added-value parts. In applications such as hot stamping, the thermal behavior of the material is essential to ensure the proper operation of the manufactured part. Therefore, the effective thermal diffusivity of the material needs to be evaluated. In the present work, the thermal diffusivity of laser-deposited AISI H13 is measured experimentally using flash and lock-in thermography. Because of the fast cooling rate that characterizes the additive process and the associated grain refinement, the effective thermal diffusivity of the laser-deposited AISI H13 is approximately 15% lower than the reference value of the cast AISI H13. Despite the directional nature of the process, the laser-deposited material’s thermal diffusivity behavior is found to be isotropic. The paper also presents a case study that illustrates the impact of considering the effective thermal conductivity of the deposited material on the hot stamping process.

scholarly journals Influence of Selective Laser Melting Technology Process Parameters on Porosity and Hardness of AISI H13 Tool Steel: Statistical Approach

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6052
Author(s):  
Filip Véle ◽  
Michal Ackermann ◽  
Václav Bittner ◽  
Jiří Šafka
Keyword(s):  
Selective Laser Melting ◽  
Tool Steel ◽  
Scanning Speed ◽  
Technological Parameters ◽  
Laser Melting ◽  
H13 Tool Steel ◽  
Aisi H13 ◽  
Beam Parameters ◽  
The Impact ◽  
Aisi H13 Tool Steel

The correct setting of laser beam parameters and scanning strategy for Selective Laser Melting (SLM) technology is a demanding process. Usually, numerous experimental procedures must be taken before the final strategy can be applied. The presented work deals with SLM technology and the impact of its technological parameters on the porosity and hardness of AISI H13 tool steel. In this study, we attempted to map the dependency of porosity and hardness of the tested tool steel on a broad spectrum of scanning speed–-laser power combinations. Cubic samples were fabricated under parameters defined by full factorial DOE, and metallurgic specimens were prepared for measurement of the two studied quantities. The gathered data were finally analyzed, and phenomenological models were proposed. Analysis of the data revealed a minimal energy density of 100.3 J/mm3 was needed to obtain a dense structure with a satisfactory hardness level. Apart from this, the model may be used for approximation of non-tested combinations of input parameters.

scholarly journals SUPPORT FOR MANAGING PARTLY CONFIGURABLE MODULAR SYSTEMS

2021 ◽  
Vol 1 ◽  
pp. 2791-2800
Author(s):  
Jarkko Pakkanen ◽  
Teuvo Heikkinen ◽  
Nillo Adlin ◽  
Timo Lehtonen ◽  
Janne Mämmelä ◽  
...  
Keyword(s):  
Portfolio Management ◽  
Product Variety ◽  
Added Value ◽  
Modular System ◽  
Product Management ◽  
Design Decision ◽  
Product Portfolio ◽  
Modular Systems ◽  
Engineer To Order ◽  
The Impact

AbstractThe paper studies what kind of support could be applied to the management of partly configurable modular systems. The main tasks of product management, product portfolio management and product variety management are defined. In addition, a partly configurable product structure and modular system are defined. Because the limited support in the literature for managing partly configurable modular systems, the article reviews previous product development cases in which authors have been involved on lessons learnt basis, i.e., if the methods and tools used in the cases could provide support for the research objective. As a result, the existing definition of the modular system should be extended by the concepts of non-module and design decision sequence description when dealing with partly configurable modular systems. This is because engineer-to-order should be made possible in cases where it brings clear added value to the customer compared to completely pre-defined solutions that may limit the customer's interest in the offering. Tools to assess the impact of changes to the product offering are required. These should be taken into account in frameworks that are used in method and tool development.

scholarly journals Understanding Social Impact and Value Creation in Hybrid Organizations: The Case of Italian Civil Service

2021 ◽  
Vol 13 (7) ◽  
pp. 4058
Author(s):  
Paolo Esposito ◽  
Valerio Brescia ◽  
Chiara Fantauzzi ◽  
Rocco Frondizi
Keyword(s):  
Value Chain ◽  
Social Impact ◽  
Civil Service ◽  
Added Value ◽  
Hybrid Organizations ◽  
Case Study Analysis ◽  
Public Resources ◽  
Five Elements ◽  
Definition Of ◽  
The Impact

The aim of this paper is twofold: first, it aims to analyze what kind of value is generated by hybrid organizations and how; second, it aims to understand the role of social impact assessment (SIA) in the measurement of added value, especially in terms of social and economic change generated by hybrids. Hybrid organizations are a debated topic in literature and have different strengths in responding to needs, mainly in the public interest. Nevertheless, there are not many studies that identify the impact and change generated by these organizations. After highlighting the gap in the literature, the study proposes an innovative approach that combines SIA, interview, interventionist approach and documental analysis. The breakdown of SIA through the five elements of the value chain (inputs, activities, outputs, outcomes, and impact) guarantees a linear definition of the value generated through change with procedural objectivity capable of grasping hybrid organizations’ complexity. The value generated or absorbed is the change generated by the impact measured based on the incidence of public resources allocated. Through the SIA and counterfactual approach, the civil service case study analysis highlights how the value generated by public resources can be measured or more clearly displayed in the measurement process itself.

scholarly journals Leveraging Existing Data from CMS-Linked Cohort Studies for the Advancement and Translation of Frailty Research

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 777-777
Author(s):  
Qian-Li Xue ◽  
Kristine Ensrud ◽  
Shari Lin
Keyword(s):  
Cohort Studies ◽  
Healthcare Utilization ◽  
Risk Adjustment ◽  
Healthcare Services ◽  
Self Report ◽  
Added Value ◽  
Care Organization ◽  
Frailty Phenotype ◽  
Frailty Assessment ◽  
The Impact

Abstract As population aging is accelerating rapidly, there is growing concern on how to best provide patient-centered care for the most vulnerable. Establishing a predictable and affordable cost structure for healthcare services is key to improving quality, accessibility, and affordability. One such effort is the “frailty” adjustment model implemented by the Centers for Medicare & Medicaid Services (CMS) that adjusts payments to a Medicare managed care organization based on functional impairment of its beneficiaries. Earlier studies demonstrated added value of this frailty adjuster for prediction of Medicare expenditures independent of the diagnosis-based risk adjustment. However, we hypothesize that further improvement is possible by implementing more rigorous frailty assessment rather than relying on self-report of ADL difficulties as used for the frailty adjuster. This is supported by the consensus and clinical observations that neither multimorbidity nor disability alone is sufficient for frailty identification. This symposium consists of four talks that leverage data from three CMS-linked cohort studies to investigate the utility of assessment of the frailty phenotype for predicting healthcare utilization and costs. Talk 1 and 2 use data from the NHATS cohort to assess healthcare utilization by frailty status in the general population and the homebound subset. Talk 3 and 4 use data from the MrOS study and the SOF study to investigate the impact of frailty phenotype on healthcare costs. Taken together, their findings highlight the potential of incorporating phenotypic frailty assessment into CMS risk adjustment to improve the planning and management of care for frail older adults.

scholarly journals Geoinformation Technologies in Support of Environmental Hazards Monitoring under Climate Change: An Extensive Review

2021 ◽  
Vol 10 (2) ◽  
pp. 94
Author(s):  
Andreas Tsatsaris ◽  
Kleomenis Kalogeropoulos ◽  
Nikolaos Stathopoulos ◽  
Panagiota Louka ◽  
Konstantinos Tsanakas ◽  
...  
Keyword(s):  
Climate Change ◽  
Environmental Monitoring ◽  
Environmental Hazards ◽  
Geographic Information ◽  
Added Value ◽  
Spatial Data Analysis ◽  
Anthropogenic Factors ◽  
Geospatial Technologies ◽  
Main Challenge ◽  
The Impact

Human activities and climate change constitute the contemporary catalyst for natural processes and their impacts, i.e., geo-environmental hazards. Globally, natural catastrophic phenomena and hazards, such as drought, soil erosion, quantitative and qualitative degradation of groundwater, frost, flooding, sea level rise, etc., are intensified by anthropogenic factors. Thus, they present rapid increase in intensity, frequency of occurrence, spatial density, and significant spread of the areas of occurrence. The impact of these phenomena is devastating to human life and to global economies, private holdings, infrastructure, etc., while in a wider context it has a very negative effect on the social, environmental, and economic status of the affected region. Geospatial technologies including Geographic Information Systems, Remote Sensing—Earth Observation as well as related spatial data analysis tools, models, databases, contribute nowadays significantly in predicting, preventing, researching, addressing, rehabilitating, and managing these phenomena and their effects. This review attempts to mark the most devastating geo-hazards from the view of environmental monitoring, covering the state of the art in the use of geospatial technologies in that respect. It also defines the main challenge of this new era which is nothing more than the fictitious exploitation of the information produced by the environmental monitoring so that the necessary policies are taken in the direction of a sustainable future. The review highlights the potential and increasing added value of geographic information as a means to support environmental monitoring in the face of climate change. The growth in geographic information seems to be rapidly accelerated due to the technological and scientific developments that will continue with exponential progress in the years to come. Nonetheless, as it is also highlighted in this review continuous monitoring of the environment is subject to an interdisciplinary approach and contains an amount of actions that cover both the development of natural phenomena and their catastrophic effects mostly due to climate change.

Thermal Diffusivity Measurement of a NiTi Shape Memory Alloy Using a Periodic Temperature Field

2021 ◽  
Vol 42 (10) ◽  
Author(s):  
José Ricardo Ferreira-Oliveira ◽  
Paulo César Sales da Silva ◽  
Luiz Roberto Rocha de Lucena ◽  
Rômulo Pierre Batista dos Reis ◽  
Carlos José de Araújo ◽  
...  
Keyword(s):  
Temperature Field ◽  
Thermal Diffusivity ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Niti Shape Memory Alloy ◽  
Thermal Diffusivity Measurement ◽  
Diffusivity Measurement ◽  
Periodic Temperature

scholarly journals Application of Multi-Actor Multi-Criteria Analysis for Transition Management in Energy Communities

2021 ◽  
Vol 13 (4) ◽  
pp. 1783
Author(s):  
Maria Luisa Lode ◽  
Geert te Boveldt ◽  
Cathy Macharis ◽  
Thierry Coosemans
Keyword(s):  
Social Representation ◽  
Added Value ◽  
Final Decision ◽  
Transition Management ◽  
Low Carbon ◽  
Current Application ◽  
Low Carbon Economy ◽  
Multi Criteria Analysis ◽  
Multi Stakeholder ◽  
The Impact

Energy communities (ECs) play a role in the transition towards a low-carbon economy by 2050 and receive increasing attention from stakeholders within the energy sector. To foster ECs, transition management (TM) is a promising managerial approach to steer and guide the transition towards more sustainable practices. However, TM lacks a consistent methodology that addresses the criticism of the current application. To investigate what a structured and replicable TM approach for ECs can look like, this paper applies the multi-actor multi-criteria analysis (MAMCA), a participative multi-criteria decision method, to a case study EC in the Netherlands involving various stakeholders. The impact of the application on power relations, the political sphere, sustainability conceptualization, guidance of transitions, and representation was analyzed. MAMCA was found useful for multi-stakeholder settings seen in potential ECs, offering a unifying methodology for the practical application of TM. In the EC setting, the added value of MAMCA within TM lies more in the social representation, insight into stakeholder viewpoints, and communication rather than in final decision-making.

ChemInform Abstract: Thermal Diffusivity Measurement of Uranium-Thorium-Zirconium Hydride.

ChemInform ◽  
2001 ◽  
Vol 32 (15) ◽  
pp. no-no
Author(s):  
B. Tsuchiya ◽  
J. Huang ◽  
K. Konashi ◽  
W. Saiki ◽  
T. Onoue ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
Zirconium Hydride ◽  
Thermal Diffusivity Measurement ◽  
Diffusivity Measurement
Sign in / Sign up

Export Citation Format

Share Document