Determination of initiation of dynamic recrystallization in AISI 4340 steel

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

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

ผู้เผยแพร่: Trans Tech Publications

ปีที่เผยแพร่ (ค.ศ.): 2014

Volume number: 893

หน้าแรก: 381

หน้าสุดท้าย: 386

จำนวนหน้า: 6

ISBN: 9783038350255

นอก: 1022-6680

eISSN: 1662-8985

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896371520&doi=10.4028%2fwww.scientific.net%2fAMR.893.381&partnerID=40&md5=cf0eb28ea6444ad1fb885088df0b736e

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

In this work, two approaches for determining critical stress and strain for initiation of dynamic recrystallization (DRX) of the AISI 4340 steel were presented.The first one applied a polynomial function to represent relationship between work hardening rate and flow stress. Secondly, Cingara constitutive model were employed. To investigate hot deformation behavior of the steel, compression tests were performed at different temperatures between 850 ฐC and 1150 ฐC and strain rates between 0.01s-1and 10 s-1. Obviously, both methods provided different values of critical stress and critical strain.Accuracy of the first method depended on fluctuations of the fitted strain hardening curve. On the other hand, results of the Cingara model was primarily related to the described flow curves up to their peak points. It could be noticed that the DRX occured during hot deformation of the examined steel started when the normalized critical stress and strain reached the values of 0.735 and 0.324, respectively. ฉ (2014) Trans Tech Publications, Switzerland.

คำสำคัญ

Critical stress and strain