Flow behaviour of Nickel Aluminium Bronze under hot deformation

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Thossatheppitak B., Uthaisangsuk V., Mungsuntisuk P., Suranuntchai S., Manonukul A.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2014

วารสาร: Materials Science and Engineering: A (0921-5093)

Volume number: 604

หน้าแรก: 183

หน้าสุดท้าย: 190

จำนวนหน้า: 8

นอก: 0921-5093

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896937606&doi=10.1016%2fj.msea.2014.03.025&partnerID=40&md5=5c7b0c2af8667c0c806090ce79bdb5fa

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Flow behaviour of a Nickel Aluminium Bronze (NAB) alloy under hot compressive deformation was investigated using a deformation dilatometer. Temperatures of 1023, 1073, 1123 and 1173K and strain rates of 0.1, 1.0 and 10s-1 were used as the forming parameters. The experimental results showed that true stress-strain curves of the alloy exhibited dynamic recovery and dynamic recrystallisation with single-peak stress. Dynamic recovery was dominant at higher temperature and lower strain rate. The peak stress increased as the strain rate and temperature increased. The peak strain also increased with increasing strain rate. However, it was independent of temperature. The flow curves can be represented by the hyperbolic-sine law Arrhenius equation with activation energy of 514.25kJ/mol. Comparisons between predicted flow stresses and experimentally determined results showed that the developed constitutive models were sufficiently accurate to demonstrate flow behaviour at high temperatures of the NAB alloy. This was supported by a correlation coefficient R of 0.981 and an average relative error of 13.42% for the particular test conditions. Dynamic material modelling approach has been used to describe flow stability/instability. For the NAB alloy, the criterion of the strain rate sensitivity, the criterion with regard to the variation of strain rate sensitivity with logε̇ and the criterion of the temperature sensitivity were always satisfied. The critical criterion is the rate of change of the temperature sensitivity with respect to logε̇. © 2014 Elsevier B.V.

คำสำคัญ

Flow behaviour, Nickel Aluminium Bronze