CAJ | 학술논문

提出了一种全新的超塑性研究方法：基于m值的高效超塑变形机制。采用该方法对TC6钛合金进行高温拉伸实验,研究其超塑性能,并与最大m值法超塑性进行比较分析。实验结果表明,细晶组织的该合金具有优良的超塑性,最佳变形温度在900℃,最大m值超塑变形可以获得20倍的最大延伸率;基于m值的高效超塑变形可以显著提高超塑成形效率,在获得延伸率为16.96倍的优良超塑性前提下,成形效率可提高13倍。
제출료일충전신적초소성연구방법：기우m치적고효초소변형궤제。채용해방법대TC6태합금진행고온랍신실험,연구기초소성능,병여최대m치법초소성진행비교분석。실험결과표명,세정조직적해합금구유우량적초소성,최가변형온도재900℃,최대m치초소변형가이획득20배적최대연신솔;기우m치적고효초소변형가이현저제고초소성형효솔,재획득연신솔위16.96배적우량초소성전제하,성형효솔가제고13배。
A new superplastic deformation approach, the so-called high-efficiency superplastic deformation （HESPD） based on m value is proposed in this research and its mechanism is investigated via the superplastic deformation （SPD） of TC6 Ti-alloy by using the proposed approach. Through the physical experiments, the approach is compared with the maximum m SPD and it is shown that the Ti-alloy with fined microstrueture behaves excellent SPD capacity. Atthe deformation temperature of 900 ℃, the best elongation of 2 000% is obtained by using the maximum m SPD. While with the HESPD, the elongation of the Ti-alloy is 1 696% ,and the deformation efficiency is increased by 13 times.