Influence of Ce and Mn addition on α-Fe morphology in recycled Al-Si alloy ingots

The influence of Ce or Ce and Mn combined additions on the morphology of a-Fe phases in recycled AloSi alloys was experimentally investigated by microstructure observation and room temperature tensile testing. It is found that Ce modifies the morphology of a-Fe phase from the large Chinese script-like into the individual and fine nodular shape. A combined addition of Ce and Mn results in the promotion of primary a-Fe formation, and their size increases considerably with the increase in Ce content. The mechanism of the above morphological changes was discussed in accordance with the nucleation and growth of a-Fe phase during solidification.

Research Progress in "Person-centered" Nursing

This paper reviews the research progress of “person-centered” nursing,and provides reference for the development of “person-centered” nursing in China.Currently,foreign scales have been developed to measure “person-centered” nursing,such as Individualized Care Scale,P-CA,Assess Health Care Providers’ Implementation of Patient-Cen,Person-centered Critical Care Nursing and Human-based Perioperative Care Scale.The “Person-centered” nursing model has been widely used in clinical nursing and nursing management.Studies have shown that “person-centered” nursing can improve patient satisfaction and promote the physical and mental health of patients.At the same time,the combination of “person-centered” nursing and teaching promotes the innovation of medical education medicine,and its combination with architecture promotes the progress of hospital construction.Future research should focus on the overall layout of hospitals and wards,use more holistic means of psychosomatic medicine to set up more comprehensive humanistic concepts such as accompanying family members area,improve the breadth and depth of humanistic nursing field,and promote the development of humanistic nursing in China.

特勤疗养中存在的护理安全隐患及对策研究

目的:研究分析特勤疗养中存在的护理安全隐患以及解决对策。方法:随机选取本院120名特勤疗养员和护理人员,将其分为两组,对照组与观察组分别采取常规护理与安全护理,对两组护理工作效率以及护理满意度进行比较。结果:观察组疗养员自身安全意识、体能训练、饮食安全等方面评分均优于对照组,且护理人员安全意识、应急处理能力以及宣教沟通能力各方面评分明显优于对照组,差异具有统计学意义(P<0.05);观察组与对照组护理满意度分别为96.67%和83.33%,差异具有统计学意义(P<0.05)。结论:可见,特勤疗养中存在众多安全隐患,必须要针对每个护理工作环节存在的不足进行改善和调整,更大程度上减少安全事故的发生,提高综合护理效果。

Low Frequency Electromagnetic Casting of 2195 Aluminum-Lithium Alloy and Its Effects on Microstructure and Mechanical Properties

In this study,the low frequency electromagnetic casting(LFEC) technology was adopted to fabricate 2195 Al-Li alloy.The microstructure and solid solubility of as-cast 2195 alloys,as well as the second phase precipitation and tensile properties after aging,were investiagated and compared with the counterpart direct chill casting 2195 alloy.Our results indicate that LFEC can significantly improve the microstructure and metallurgical quality of as-cast alloy,and increase the number density of θ’(Al2Cu) and T1(Al2CuLi) phases during aging treatment due to the enhanced solubilities of alloying elements.The tensile properties of 2195 aged alloy cast by LFEC were hence improved evidently.

Microstructures and properties of 6016 aluminum alloy with gradient composition

Weight reduction plays an important role in reducing fuel and emissions,and the heat-treatable 6016 aluminum alloy exhibits excellent application prospect in automobile lightweight.In this paper,ingot with constant Mg/Si ratio and decreased Mg and Si contents was obtained.Both the microstructure and the texture of 6016 aluminum alloy plate designed with different alloy compositions at the top/bottom were systematically investigated by electron backscatter diffraction technology(EBSD)measurement,as well as the room-temperature mechanical properties at the different positions with composition gradient.The results indicate that as Mg and Si contents increase,the grain size decreases,improving the cube texture with recrystallization and weakening the S texture.The strength of 6016 aluminum alloy decreases with lower Mg and Si contents.