The titanium alloy Ti-407 (Ti407) is a new alloy being considered for single load to failure applications where energy absorption is a key requirement. This work characterised the deformation and failure mechanisms of Ti407 in uniaxial tension and compression at quasi-static and increased strain rates. The results are compared with equivalent tests on Ti-6Al-4 V (Ti64) to provide a benchmark. The stress-strain data under each condition reveals reduced strength but significantly increased ductility in the Ti407 alloy compared to Ti64. The reduced aluminium content in Ti407 is thought to allow additional dislocation motion and delay crack initiation and propagation. The crystallographic texture analysis on deformed specimens further suggests that in response to an applied stress, Ti407 proves more sensitive to texturing and exhibits greater grain elongation and rotation in comparison to Ti64. Its ability to accommodate significantly more deformation before failure (than Ti64) will provide opportunities for improved impact energy absorption performance, as well as improved machinability and formability (and potentially lower manufacturing cost).

钛合金Ti-407（Ti407）是一种新合金，被认为可用于单负载到失败的应用，在这些应用中，能量吸收是关键要求。这项工作表征了Ti407在准静态和增加应变率下在单轴拉伸和压缩中的变形和破坏机理。将结果与在Ti-6Al-4 V（Ti64）上进行的等效测试进行比较，以提供基准。与Ti64相比，每种条件下的应力应变数据都显示出Ti407合金强度降低，但延展性显着提高。Ti407中减少的铝含量被认为可以进行更多的位错运动并延迟裂纹的萌生和传播。变形试样的晶体织构分析进一步表明，响应于施加的应力，与Ti64相比，Ti407被证明对纹理更为敏感，并且具有更大的晶粒伸长率和旋转度。它能够承受更大的变形（比Ti64失效）更大的变形能力，将为改善冲击能量吸收性能以及提高可加工性和可成形性（并可能降低制造成本）提供机会。