In the metal forming process, the understanding of metal flows and the fracture strains are most significant to the failure/damage of the components. Usually, in metalworking, damage occurs because of nucleation, growth and coalescence of the void into a small fracture. These small fractures increased in the circumferential path due to the existence of stresses and the pores which leads to failure at the equatorial position during the upsetting of porous samples. Hence, the fracture of the workpieces strongly depends on the stresses and the pores. Such form of stresses and pores if relieved will give a better damage limit of the material. Therefore, in this research, a novel scheme of localised heating is adopted at the equatorial position of the compressed samples to enhance the critical damage parameter. The powder metallurgy route was used to prepare the required compacts with different relative densities (80%–90%) and 1 aspect ratio by applying suitable powder forming pressures. The upsetting test was performed on the obtained porous samples for various weight percentages of titanium (2%–6%) in the aluminium at the stable strain rate (0.1 s⁻¹) and the damage location was noticed for various components. After the identification of damage position, various temperatures (100 °C–250 °C) of localised heating were attempted on the failure site of the specimens after some incremental stages of upsetting tests. The experimental results were analysed using various damage criteria and it was found that the initiation of failure is delayed and increased the critical damage value by selectively heating the samples because of relieving the stresses, reduction in porosity and changes in microstructure.

在金属成形过程中，对金属流动和断裂应变的了解对部件的失效/损坏最为重要。通常，在金属加工中，由于空隙的成核、生长和合并成小裂缝而发生损坏。由于应力和孔隙的存在，这些小裂缝在圆周路径中增加，导致在多孔样品镦粗过程中赤道位置失效。因此，工件的断裂在很大程度上取决于应力和孔隙。如果消除这种形式的应力和气孔，则材料的损坏极限会更好。因此，在本研究中，在压缩样品的赤道位置采用了一种新的局部加热方案，以提高临界损伤参数。粉末冶金路线用于通过施加合适的粉末成型压力制备具有不同相对密度 (80%–90%) 和 1 个纵横比的所需压块。在稳定应变速率 (0.1 s) 下对铝中不同重量百分比的钛 (2%–6%) 获得的多孔样品进行镦粗试验^-1 ) 并且注意到各种组件的损坏位置。在确定损坏位置后，经过一些渐进的镦锻试验阶段后，在试样的破坏部位尝试了各种温度（100°C-250°C）的局部加热。使用各种损伤准则对实验结果进行了分析，发现由于应力释放、孔隙率降低和微观结构变化，通过选择性加热样品，可以延迟失效的开始并增加临界损伤值。