Effects of Interpass Idle Time on Thermal Stresses in Multipass Multilayer Weld-Based Rapid Prototyping

被引：45
作者：
Zhao, Huihui [1 ,2 ]
Zhang, Guangjun [1 ]
Yin, Ziqiang [1 ]
Wu, Lin [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] Shanghai Aerosp Equipments Manufacturer, Shanghai 200245, Peoples R China
来源：
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME | 2013年 / 135卷 / 01期
基金：
中国国家自然科学基金;
关键词：
thermal stress; numerical simulation; weld-based rapid prototyping; interpass idle time; NUMERICAL-SIMULATION; RESIDUAL-STRESSES; DEPOSITION; MODEL; 3D; DEFORMATION; PARAMETERS; DISTORTION;
D O I：
10.1115/1.4023363
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Interpass idle time is an important parameter affecting the thermal stress distribution in weld-based rapid prototyping. In this paper, the effects of interpass idle time on thermal stresses in multipass multilayer weld-based rapid prototyping are investigated using numerical simulation. Meanwhile the single-layer weld-based rapid prototyping experiment is carried out, and the residual stresses are measured in the blind-hole method. The variation trend of calculated residual stresses agrees with that of experimental measurements. The research results indicate that there exist stress release effects of rear pass on fore passes and that of rear layer on fore layers. The interpass and interlayer stresses and residual stresses are significantly dependent on interpass idle time. The residual stresses of deposition workpiece decrease with the increase of interpass idle time, whereas the interpass and interlayer stresses on the central line of substrate increase with the increase of interpass idle time.
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页数：6
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