CAJ | 학술논문

钛合金层合结构因具有较高的损伤容限而获得重视，并成为超塑成形/扩散连接技术应用的一个新方向。本文提出一种含圆形扩散止焊区的层合板结构，通过与原始板材的疲劳裂纹萌生和扩展寿命相对比，结果表明含止焊区的层合板能改善钛合金的裂纹扩展特性，并以此为基础设计并制造了含止焊区的钛合金层合接头，验证了采用现有扩散连接工艺技术制造钛合金层合接头的工艺可行性，其微观组织和各项性能等基本能满足对一般钛合金的设计使用要求。该研究成果为高损伤容限性能钛合金扩散连接层合结构在机翼梁、框等异型截面构件上的应用奠定了技术基础。
태합금층합결구인구유교고적손상용한이획득중시，병성위초소성형/확산련접기술응용적일개신방향。본문제출일충함원형확산지한구적층합판결구，통과여원시판재적피로렬문맹생화확전수명상대비，결과표명함지한구적층합판능개선태합금적렬문확전특성，병이차위기출설계병제조료함지한구적태합금층합접두，험증료채용현유확산련접공예기술제조태합금층합접두적공예가행성，기미관조직화각항성능등기본능만족대일반태합금적설계사용요구。해연구성과위고손상용한성능태합금확산련접층합결구재궤익량、광등이형절면구건상적응용전정료기술기출。
The laminated structure of titanium alloy has achieved special attention for its high damage tolerance, and become a new application trend of SPF/DB technology. A laminated structure with circle diffu-sion no-weld region based on damage tolerance design is introduced. Compared with the original plank, it shows improved property of crack initiation and propagation tol-erance. A titanium alloy laminated joint piece with no-weld region is designed and manufactured, which verifies the feasibility for making a laminated structure through apply-ing diffusion bonding technology. The microstructure and mechanical property are satisifed with the general design requirements for application. The research achievements lay a technical foundation for the titanium alloy laminated structure application on the wing beam, box and other member with special section.