In this study, multicomponent alloy fillers were deposited on low-carbon steel substrates using gas tungsten arc welding (GTAW) process. The microstructure and wear properties of Al-Co-Cr-Ni-Mo-Fe-Si multicomponent alloys were studied. The GTAW cladding layers were analyzed by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), and transmission electron microscope (TEM). The results show that the microstructure mainly consisted of dendritic FeMoSi and interdendritic BCC phases and that the addition of Si coarsened the primary FeMoSi phase. In addition, different precipitate morphologies were found in the interdendrites. As the Si content increased from 5.92 to 14.53 at%, the microhardness also increased from 826 to 885 Hv and the wear resistance improved significantly. The FeMoSi dendrites possessed covalent-dominant strong atomic bonds that enhanced the hardness and wear resistance of claddings.

A study of elderly Chinese-American residents in the Chinatown area of Los Angeles reveals hidden poverty, loneliness, language barriers, physical isolation, a sense of familial dislocation, and a lack of concern for the future. Work is needed to develop programs and services to meet the needs of this population.

Utilizing the continuity/discontinuity theory as a framework, an exploratory and descriptive study was conducted on 150 minority elderly (Black, Chinese, and Mexican Americans) in three nutrition programs. Three hypotheses tested this theory using four sets of independent variables: food patterns, health status, social interaction, and program activities; and the dependent variable: levels of participation in the nutrition programs. Through interviews, the findings partially supported the hypotheses as well as the null hypothesis of no significant differences among ethnic groups. Some policy, research, and practice issues were identified. It is hoped that this study has generated some..new understanding and interests in supporting satisfying life patterns and future improvements in nutrition programs.

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