Age-hardening and tensile properties of low gold (10-14 kt.) alloys.
Age-hardening and tensile properties of low gold (10-14 kt.) alloys.
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低金（10-14 kt.）合金的时效硬化和拉伸性能。
DOI：
10.1002/jbm.820150202
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
Leinfelder,KF
中科院分区：
文献类型：
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作者：
Kusy,RP;Leinfelder,KF
测定了七个 10-14 kt 的时效硬化和拉伸性能。金合金、传统 II 型合金和纯银合金。对于低金合金，热硬化曲线表明，在 400°C 下 30 分钟后达到最大时效效果。通过对金属丝或哑铃样品配置进行拉伸试验，测量固溶退火 (S) 和硬化 (H) 状态下合金的杨氏模量 (E)、比例极限 (P.L.)、极限拉伸强度 (U.T.S.) 和断裂伸长率。这些应力应变数据不仅证实了之前提到的传统金合金 E、P.L. 或 U.T.S. 之间的相关性。和硬度之间以及 U.T.S.和 P.L.，但也随着 (H) 态下的 Au/Cu 比率而系统地变化。在相同的热处理和拉伸试验条件下，将制造商的铸造样品与本实验室的样品进行比较表明，而E、P.L.和U.T.S.略有不同，最大的变化发生在断裂伸长率。在测量不同样本配置的孔隙率并使用 VHN 分析 log10 伸长率后，结论很明确：样本几何形状显着影响物理性能。在此基础上，提出的哑铃几何形状优于 ADA 规范第 5 号中当前引用的线材样本配置。
The age‐hardening and tensile properties were determined for seven 10–14 kt. gold alloys, a conventional type II, and a sterling silver alloy. For the low‐gold alloys the heat hardening curves indicated that the maximum aging effects were attained after 30 min at 400°C. From tensile tests on either wire or dumbbell specimen configurations, Young's modulus (E), proportional limit (P.L.), ultimate tensile strength (U.T.S.), and elongation to break were measured for alloys in both the solution annealed (S) and the hardened (H) state. These stress‐strain data not only confirmed previous correlations noted for conventional gold alloys between eitherE, P.L., or U.T.S. and hardness and between U.T.S. and P.L., but also varied systematically with the Au/Cu ratios in the (H) state. Under identical heat treatment and tensile testing conditions, comparison of the manufacturers' cast samples with this laboratory's specimens showed that, while theE, P.L., and U.T.S. differed somewhat, the greatest change occurred in the elongation to break. Here after measuring the porosity of the different specimen configurations and analyzing the log10elongation with VHN, the conclusion was clear: Specimen geometry markedly influenced the physical properties. On this basis the proposed dumbbell geometry is advocated over the wire specimen configuration currently cited in ADA Specification No. 5.