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| Research on Thermal-Mechanical Coupling and Residual Stress Field on Turning GH4169 |
| YAO Changfeng1, CHEN Guangchao1, LIU Chao2, WU Ningning2, LI Xiancai2 |
(1.The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology,
Ministry of Education, Northwestern Polytechnical University,Xi’an 710072,China;
2.Catic Hunan General Aviation Engine Co., Ltd.,Zhuzhou 412002,China) |
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Abstract Nickel-base superalloy GH4169 is a heat-resistant alloy with excellent mechanical properties and corrosion
resistance, which widely used in aerospace engineering and other fields. The residual stress caused by thermal – mechanical
in cutting process has an important effect on the fatigue performance of the part. In this paper, the GH4169 turning
experiments and Deform-3D simulation were carried on. The residual stress field is studied by the experimental cutting
force and the simulative temperature-strain field. The results show that the influence of tool wear on the main cutting force
and turning temperature is very significant. During the tool wear process, the main cutting force increases from 538N to
756N, and the shear zone temperature increases from 552℃ to 654℃ . The surface strain increases from 3.3 to 3.5; The
increase in cutting force and temperature-strain caused by tool wear which result in surface residual tensile stress increase
from 517MPa, 242MPa increased to 860MPa and 442MPa in circumferential and feed direction, the peak residual compressive
stress of the layer increase from -696MPa, -356MPa to -756MPa, -456MPa; the depth of residual stress layer increase
from 72μm to 85μm.
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2017, 
