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- Title
STUDY ON THE MICROSTRUCTURE, ELECTRICAL AND MECHANICAL PROPERTIES OF HOT PRESSING Cr-50 MASS % NI ALLOYS FABRICATED BY ADDITION OF VARIOUS RATIOS OF NANOSIZED NI POWDERS.
- Authors
JHONG-REN HUANG; SHIH-HSIEN CHANG; CHENG-LIANG LIAO
- Abstract
In this work, nanosized Ni (nNi) powders of 50 nm are mixed with Cr and Ni submicron-powders (600 nm) to fabricate Cr-50 mass% Ni alloys by vacuum hot pressing. In order to evaluate the influence of the nanosized Ni powders, different amounts of nanosized Ni powders are added to produce the Cr-(50-x) mass% Ni-x mass% nNi alloys (x = 0, 10, 20, and 30). The hot pressing was maintained at 1275°C, 48 MPa for 1 h. The microstructure evaluation, mechanical, and electrical properties were performed. The results reveal that mechanical and electrical properties are enhanced when increasing the nNi addition. The Cr-20 mass% N i-30 mass% nNi presents the highest relative density of 96.53% and the electrical conductivity of 2.18×104 Scm-1, moreover, the hardness and transverse rupture strength values increase to 76.1 HRA and 1217 MPa, respectively. Moreover, a more homogeneous microstructure and a decrease in the mean grain size to 3.15 µm are acquired. Significantly, this fabrication procedure (adding 30 mass% nanosized nickel powders) results in the optimal microstructure, electrical and mechanical properties of submicronstructured Cr-(50-x) mass% Ni-x mass% nNi alloys.
- Subjects
ALLOY powders; HOT pressing; FLEXURAL strength; POWDERS; MICROSTRUCTURE; ALLOYS; SPECIFIC gravity
- Publication
Archives of Metallurgy & Materials, 2022, Vol 67, Issue 3, p955
- ISSN
1733-3490
- Publication type
Article
- DOI
10.24425/amm.2022.139688