Balos Sebastian, Pecanac Milan, Trivkovic Mirjana, Bojic Savo, Hanus Pavel
Department of Production Engineering, Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia.
Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
Materials (Basel). 2024 Apr 29;17(9):2107. doi: 10.3390/ma17092107.
In this paper, an iron-aluminide intermetallic compound with cerium addition was subjected to Vickers microhardness testing. A full range of Vickers microhardness loadings was applied: 10, 25, 50, 100, 200, 300, 500, and 1000 g. Tests were conducted in two areas: 0.5 mm under the surface of the rolled specimen and in the center. The aim was to find the optimal loading range that gives the true material microhardness, also deemed load-independent hardness, H. The results suggest that in the surface area, the reverse indentation size effect (RISE) occurred, similar to ceramics and brittle materials, while in the center, indentation size effect (ISE) behavior was obtained, more similar to metals. This clearly indicated an optimal microhardness of over 500 g in the surface region and over 100 g in the central region of the specimen. Load dependencies were quantitatively described by Meyer's law, proportional specimen resistance (PSR), and the modified PSR model. The modified PSR model proved to be the most adequate.
在本文中，对添加铈的铁铝金属间化合物进行了维氏显微硬度测试。施加了一系列维氏显微硬度载荷：10、25、50、100、200、300、500和1000克。测试在两个区域进行：轧制试样表面以下0.5毫米处和中心。目的是找到能给出真实材料显微硬度（也称为与载荷无关的硬度H）的最佳载荷范围。结果表明，在表面区域出现了反向压痕尺寸效应（RISE），类似于陶瓷和脆性材料，而在中心区域获得了压痕尺寸效应（ISE）行为，更类似于金属。这清楚地表明，在试样的表面区域，最佳显微硬度超过500克，在中心区域超过100克。通过迈耶定律、比例试样阻力（PSR）和修正的PSR模型对载荷依赖性进行了定量描述。结果证明修正的PSR模型最为合适。
