Mechanical properties of recrystallized L12-type Ni3(Si,Ti) intermetallics
Mechanical properties of recrystallized L12-type Ni3(Si,Ti) intermetallics
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再结晶L12型Ni3(Si,Ti)金属间化合物的力学性能
DOI：
10.1007/bf00544451
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发表时间：
1991
影响因子：
4.5
通讯作者：
M. Yoshida
中科院分区：
文献类型：
--
作者：
T. Takasugi;O. Izumi;M. Yoshida
通过拉伸试验研究了未掺杂和掺杂50 p.p.m.硼的Ni 3（Si，Ti）合金的力学性能，这两种合金都是通过再结晶制备的多晶试样。屈服应力随温度的升高而增大，在800 K时达到最大值，随后又减小。拉伸伸长率是最高的，在室温下，并倾向于降低两种合金的温度增加，但始终高于在硼掺杂的Ni3（Si，Ti）合金比在未掺杂的在所有的测试温度。极限拉伸应力（UTS）随温度的变化与拉伸伸长率的变化相似。无论合金种类和试验温度如何，随着延伸率的增加，穿晶断裂占主导地位。因此，本工作再次证实了作者提出的合金化方法对改善L12型有序合金的晶界结合力是有用的。
The mechanical properties of the Ni3(Si, Ti) alloys undoped and doped with 50 p.p.m. boron, both of which were polycrystalline specimens prepared by recrystallization, were investigated by tensile testing. The yield stress was found to increase with increasing test temperature to a maximum at 800 K, followed by a decrease. The tensile elongation was highest at room temperature and tended to decrease with increasing temperature for both alloys, but was consistently higher in the boron-doped Ni3(Si, Ti) alloys than in the undoped ones over all the test temperatures. The change in the ultimate tensile stress (UTS) with temperature was similar to that of tensile elongation. The transgranular fracture became dominant as the elongation increased, regardless of the alloys and the testing temperature. Thus, this work again verified that the alloying method proposed by the present authors is useful for improving the grain-boundary cohesion of L12-type ordered alloys.