Microstructure based flow stress modeling for quenched and tempered low alloy steel

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Phetlam P., Uthaisangsuk V.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2015

วารสาร: Materials & Design (0264-1275)

Volume number: 82

หน้าแรก: 189

หน้าสุดท้าย: 199

จำนวนหน้า: 11

นอก: 0264-1275

eISSN: 1873-4197

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941278702&doi=10.1016%2fj.matdes.2015.05.068&partnerID=40&md5=9aaf583af20193c25f6275af9b3b9015

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Quenching and tempering (Q&T) process is commonly applied in part making industries for improving mechanical properties of carbon low alloy steels. After Q&T, microstructure of the steel consists of temper martensite and carbide precipitations. In this work, material modeling for describing flow stress behavior of the SNCM439 alloy steel under different tempering conditions was introduced. Microstructure based models were developed on both macro- and micro-scale. The models were afterwards applied in FE simulations for predicting stress-strain responses of the tempered steels. For the macroscopic model, the Ludwik equation was used, in which precipitation strengthening depending on particle size was incorporated by the Ashby-Orowan relationship. For the microscopic model, representative volume elements (RVEs) were generated considering microstructure characteristics of the examined steels. Flow curves of the individual constituents were described based on dislocation theory and chemical compositions. The FE simulations of tensile tests and RVE simulations under uniaxial tension were performed using the introduced models. The influences of the carbide precipitations on mechanical behavior of the tempered steels were investigated. The resulted effective stress-strain curves were determined and compared with the experimental ones. Both macroscopic and microscopic approaches accurately predicted mechanical properties and strain hardening behaviors of the tempered steels. ฉ 2015 Elsevier Ltd.

คำสำคัญ

Carbide precipitation, Flow stress, Low alloy steel, Quenching and tempering