Digital fingerprints of microstructural variation in titanium alloy hip joint forgings via machining force feedback analysis
Digital fingerprints of microstructural variation in titanium alloy hip joint forgings via machining force feedback analysis
复制标题
通过加工力反馈分析钛合金髋关节锻件显微组织变化的数字指纹
DOI：
10.1016/j.matchar.2022.112198
复制
发表时间：
2022
影响因子：
4.7
通讯作者：
Fernández Silva B
中科院分区：
文献类型：
--
作者：
Fernández Silva B
考虑到预期寿命的实际趋势，预计由于人口日益老龄化，髋关节置换的总数在未来几十年将会增加。这种情况将需要增加零部件供应和在制造供应链中拥有钛合金闭式模锻经验。然而，与航空航天工业相比，骨科植入物加工过程中微观结构演变的审查并不在同一水平上。这项研究的重点是通过应用航空航天工业中目前用于安全关键钛合金部件的标准表征技术以及谢菲尔德开发的加工力反馈技术来了解国际锻造供应链中当前的组织质量。研究了近净成形髋关节锻件均通过行业标准的三家不同厂家。通过数字指纹重建，显微组织的变化已被证明与锻造工艺参数有关，这些参数有助于确定单个部件的疲劳性能。此外，显微组织质量的显著变化可能会影响零件的性能。研究表明，骨科植入物的材料标准可以更严格，以避免供应链中如此大的微观结构差异。
Considering actual trends regarding life expectancy, it is forecast that the total number of hip replacements will increase in the next few decades due to an increasingly ageing population. This situation will require an increase in component supply and experience of titanium alloy closed-die forging experience in the manufacturing supply chain. However, the scrutiny of microstructural evolution during processing for orthopaedic implants is not at the same level compared to the aerospace industry. This study is focused on understanding the current microstructure quality in the international forging supply chain by applying standard characterisation techniques, currently used in the aerospace industry for safety critical titanium alloy components, as well as a Sheffield developed machining force feedback technique. Three different manufacturers whose near net shape hip joint forgings all successfully pass the industry standards were studied. Through digital fingerprint reconstructions, the microstructural variation has been shown to be linked to the forging process parameters which could help to determine the individual components' fatigue performance. Furthermore, significant variations have been identified in microstructure quality that could compromise the part performance. The study demonstrates that the materials standards for orthopaedic implants could be more stringent to avoid such large microstructural variations in the supply chain.