Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The influence of Strontium addition on wear properties of Al–20wt% Si alloys under dry reciprocating sliding condition
Abstract The modification response of Al–20wt% Si alloys was studied with different Sr addition levels. The wear properties of Al–Si alloys modified by Sr were investigated by using a UMT-3 reciprocating wear machine over a range of normal loads, i.e., 2, 5, 8N, at the frequency of 50Hz. The worn morphologies of the wear surface were examined by scanning electron microscopy (SEM). The results show that the primary Si and the interdendritic eutectic matrix are obviously changed after the Sr modification. The frictional coefficient greatly changes at a low load and mains unnoticeably at a high load. In addition, the frictional coefficients of the unmodified alloys decrease with increasing of the load, but those of the modified alloys increase when Sr addition level exceeds 0.04wt%. The wear volumes of Al–Si alloys are inversely proportional to the hardness. The wear behaviors are optimal in the range of 0.04–0.06wt% Sr. Adhesive wear is the main mechanism for the unmodified alloys, whereas abrasion wear characterizes in the modified alloys.
The influence of Strontium addition on wear properties of Al–20wt% Si alloys under dry reciprocating sliding condition
Abstract The modification response of Al–20wt% Si alloys was studied with different Sr addition levels. The wear properties of Al–Si alloys modified by Sr were investigated by using a UMT-3 reciprocating wear machine over a range of normal loads, i.e., 2, 5, 8N, at the frequency of 50Hz. The worn morphologies of the wear surface were examined by scanning electron microscopy (SEM). The results show that the primary Si and the interdendritic eutectic matrix are obviously changed after the Sr modification. The frictional coefficient greatly changes at a low load and mains unnoticeably at a high load. In addition, the frictional coefficients of the unmodified alloys decrease with increasing of the load, but those of the modified alloys increase when Sr addition level exceeds 0.04wt%. The wear volumes of Al–Si alloys are inversely proportional to the hardness. The wear behaviors are optimal in the range of 0.04–0.06wt% Sr. Adhesive wear is the main mechanism for the unmodified alloys, whereas abrasion wear characterizes in the modified alloys.
The influence of Strontium addition on wear properties of Al–20wt% Si alloys under dry reciprocating sliding condition
Liu, Gang (Autor:in) / Li, Guodong (Autor:in) / Cai, Anhui (Autor:in) / Chen, Zhaoke (Autor:in)
15.06.2010
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2011
Wear mechanisms of nitinol under reciprocating sliding contact
| British Library Online Contents | 2014
Reciprocating sliding wear behavior of high-strength nanocrystalline Al84Ni7Gd6Co3 alloys
| British Library Online Contents | 2017
Wear maps of TZP/steel reciprocating sliding couple under dry sliding
| British Library Online Contents | 1996
Wear characterization of Ti-6Al-4V under fretting-reciprocating sliding conditions
| British Library Online Contents | 2008