Constitutive modeling of flow behaviour of AISI 4340 steel under hot working conditions

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Sanrutsadakorn A., Uthaisangsuk V., Suranuntchai S., Thossatheppitak B.

ผู้เผยแพร่: Trans Tech Publications

ปีที่เผยแพร่ (ค.ศ.): 2013

Volume number: 249-250

หน้าแรก: 863

หน้าสุดท้าย: 869

จำนวนหน้า: 7

ISBN: 9783037855577

นอก: 1660-9336

eISSN: 1662-7482

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872915458&doi=10.4028%2fwww.scientific.net%2fAMM.249-250.863&partnerID=40&md5=f5e630c9187602da6a5d99ecea857850

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

Using compression test on a thermo-mechanical simulator/dilatometer, hot deformation behavior of steel AISI 4340 was studied in the temperature range of 850-1150 ฐC and strain rate range of 0.01-10 s-1. The resulted true stress-strain curves exhibited a peak stress at low strain values, after which the flow stresses decreased monotonically until higher strains, representing the dynamic flow softening. The stress level decreased with increasing deformation temperature and decreasing strain rate. The material flow behavior at elevated temperatures was described using a Zener-Hollomon parameter with an exponent-type equation. Additionally, the model was modified by compensating strain rate parameter. The stress-strain responses for the investigated steel predicted by the proposed model agreed well with the experimental results. It was confirmed that the modified constitutive equations provided a more accurate prediction of the flow stress under hot working conditions for steel AISI 4340. ฉ (2013) Trans Tech Publications, Switzerland.

คำสำคัญ

Compressive flow behaviour, Elevated temperature, Modified zener-hollomon parameter