Evaluation of Tensile Strength and Microhardness of Two Nickel- Chromium Based Casting Alloys with the Addition of Different Ratios Recasted Alloy Using Oxyacetylene Flame Casting Techniques

• Main Authors: Fahad S.A (Author), Widad A.A (Author), Sundus I.I (Author)
• Format: Book
• Published: College of Pharmacy / Mustansiriyah University, 2011-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.32947/ajps.v10i2.309; 1815-0993; 2959-183X
• Keywords: Pharmacy and materia medica; RS1-441
• Source: Al-Mustansiriyah Journal of Pharmaceutical Sciences, Vol 10, Iss 2 (2011)

The objective of this study is to evaluate the tensile strength and microhardness of Ni-Cr alloy by adding two different ratios of recasted alloy (25%,50%)and one controlled group (100%fresh alloy),some technicians in our country modifies the casting of Ni-Cr alloy by adding recasted alloy because of high cost of Ni-Cr and low economical state. We use two different trade mark of Ni-Cr alloy (wiron99 and maxwhiteness). According to ANSI/ADA Specification No. 14 (ISO 6871); 30 specimens were made for tensile testing for each alloy type. Another 30 specimens were made for micro-hardness testing which they were square in shape (6mm for each arm and 1mm thickness). ,after statistical analysis it was found that there were no significant differences between each sub-group for the same alloy type for tensile and micro-hardness testing specimens. Although there were a great significant differences between each alloy type.