12 research outputs found
On the nitrogen-induced lattice expansion of a non-stainless austenitic steel, Invar 36Ā®, under triode plasma nitriding
Chromium, as a strong nitride-forming element, is widely regarded to be an āessentialā ingredient for the formation of a nitrogen-expanded lattice in thermochemical nitrogen diffusion treatments of austenitic (stainless) steels. In this article, a proprietary āchrome-freeā austenitic iron-nickel alloy, InvarĀ® 36 (Fe-36Ni, in wt pct), is characterized after triode plasma nitriding (TPN) treatments at 400 Ā°C to 450 Ā°C and compared with a āstainlessā austenitic counterpart RA 330Ā® (Fe-19Cr-35Ni, in wt pct) treated under equivalent nitriding conditions. Cr does indeed appear to play a pivotal role in colossal nitrogen supersaturation (and hence anisotropic lattice expansion and superior surface hardening) of austenitic steel under low-temperature (ā¤ā450 Ā°C) nitrogen diffusion. Nevertheless, this work reveals that nitrogen-induced lattice expansion occurs below the nitride-containing surface layer in Invar 36 alloy after TPN treatment, implying that Cr is not a necessity for the nitrogen-interstitial induced lattice expansion phenomenon to occur, also suggesting another type of Ī³N
Cyclic Degradation Behavior of āØ 001 ā© -Oriented FeāMnāAlāNi Single Crystals in Tension
Comparison of shape memory characteristics of a Ti-50.9 At. Pct Ni alloy aged at 473 and 673 K
Time Preference and Economic Decision Making in Aging: Focusing on Implications for Economics Education
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Early warning signs of a mental health tsunami: a coordinated response to gather initial data insights from multiple digital services providers
Introduction: The immediate impact of COVID-19 on morbidity and mortality has raised the need for accurate and real time data monitoring and communication. The aim of this study is to document initial observations from multiple digital services providers during the COVID-19 crisis, especially those related to mental health and wellbeing.
Methods: We used email and social media to announce an urgent call for support. Digital mental health services providers (N=46), financial services providers (N=4) and other relevant digital data source providers (N=3) responded with quantitative and/or qualitative data insights. People with lived experience of distress, as service users/consumers, and carers are included as co-authors.
Results: This study provides proof-of-concept of the viability for researchers and private companies to work collaboratively towards a common good. Digital services providers reported a diverse range of mental health concerns. A recurring observation is that demand for digital mental health support has risen, and that the nature of this demand has also changed since COVID-19, with an apparent increased presentation of anxiety and loneliness.
Conclusion: Following this study, we will continue to work with providers in more in-depth ways to capture follow-up insights at regular time points. We will also onboard new providers to address data representativeness. Looking ahead, we anticipate the need for a rigorous process to interpret insights from an even wider variety of sources in order to monitor and respond to mental health needs