Crystallographic Analysis of Martensite in 0.2C-2.0Mn-1.5Si-0.6Cr Steel by EBSD

The crystallography of martensite formed in 0.2C-2.0Mn-1.5Si-0.6Cr steel was studied using the EBSDtechnique. The results showed that the observed orientation relationship was closer to the Nishiyama-Wassermann (N-W) than to the Kurdjumov-Sachs (K-S) orientation relationship (OR). The microstructure ofmartensite consisted of parallel laths forming morphological packet-like structures. Typically, there were threedifferent lath orientations in a morphological packet consisting of three specific N-W OR variants sharing thesame {111} austenite plane. A packet of martensite laths with common {111} austenite plane was termed as acrystallographic packet. Generally, the crystallographic packet size corresponded to the morphological packetsize, but occasionally the morphological packet was found to consist of two or more crystallographic packets.Therefore, the crystallographic packet size appeared to be finer than the morphological packet size. Therelative orientation between the variants in crystallographic packets was found to be near 60°/<110>. Thisappears to explain the strong peak observed near 60° in the grain boundary misorientation distribution.Martensite also contained a high fraction of boundaries with their misorientation in the range 2.5-8°.Typically these boundaries were found to be located inside the martensite laths forming lath-like sub-grains,whose long axes were parallel with the long axis of the martensite laths

Validation of the Finnish version of the food allergy quality of life questionnaire–parent form (F-FAQLQ-PF)

Aim: Specific questionnaires about food allergy and health-related quality of life (HRQoL) have been developed and validated in several languages, but not Finnish. We aimed to validate the Finnish Food Allergy Quality of Life Questionnaire-Parent Form (FAQLQ-PF) for children under age 13 years.Methods: The original FAQLQ-PF and Food Allergy Independent Measure (FAIM) were translated into Finnish per World Health Organisation guidelines and tested by 72 parents of children under age 13 years with suspected severe peanut or tree nut allergy who were recruited at Allergy Centre in Tampere University Hospital in Tampere, Finland. We calculated the construct validity of the questionnaire by calculating the coefficients between the two measures and used Cronbach's alpha to establish the internal consistency.Results: The FAQLQ-PF showed strong correlations with domain structure and internal consistency, based on Spearman's correlations (rho) for the HRQoL questions, FAIM questions and FAIM mean values. The total questionnaire score correlated significantly with the mean FAIM (rho = 0.95, p &lt; 0.001) and individual FAIM questions. The FAQLQ-PF and domains had good or excellent internal consistency (Cronbach's alpha &gt;0.70).Conclusion: The Finnish FAQLQ-PF demonstrated good construct validity and excellent internal consistency for measuring food allergy HRQoL in children under age 13 years.</p

Trends in severe allergic reactions of adults in Finland between 1999 and 2020 : A national population study

Non peer reviewe

Paediatric hospitalizations due to allergic reactions increasing in Finland and decreasing in Sweden

Non peer reviewe