Tecnologia em Metalurgia, Materiais e Mineração
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

Evaluation of the flange stretching capability of a 780 MPa class multiphase advanced high strength steel

Henrique Severiano de Jesus; Fernando Generoso Neiva Ferreira; Jetson Lemos Ferreira; James Mohallem; Wagner Monteiro de Souza; Rinaldo Henrique Pedrini; André Itman Filho

Downloads: 0
Views: 58


Advanced High Strength Steels or AHSS (Advanced High Strength Steels) have superior properties to conventional steel are widely used in the automotive industry, they provide weight reduction and at the same time, increase vehicle safety in the event of collisions. Flangeability is an essential element for forming automotive components such as chassis and suspension components. Research is ongoing into the development of forming techniques that can improve the performance of AHSS during industrial operations, particularly flange drawing. Therefore, there is great interest in investigating the extensibility of the pre-cut cutting edge and determining the factors that significantly influence the formability of the product. The test used to evaluate flangeability is the Hole Expansion Ratio (HER). In this research, the objective was to evaluate the influence of the conditions of four edge cutting methods on the hole expansion test of advanced multiphase high-strength steel class 780 MPa through four methods: Machining, LASER and punching with expansion of the hole in the direction of the punch (burr downwards) and in the opposite direction (burr upwards). The results of this study corroborate


Hole expansion; Edge condition; flange stretching; Machining; LASER


1 Pathak N, Butcher C, Worswick MJ, Bellhouse E, Gao J. Damage evolution in complex- phase and dual-phase steels during edge stretching. Materials (Basel). 2017;10(4):346.

2 Kesti V. Problem-solving approaches to ahss edge ductility. Sweden: SSAB Knowledge Service Center; 2021.

3 ASM Internationl. ASM Internationl Handbook – Forming and Forging Section: Blanking and Piercing of Steel Sheet, Strip and Plate. Vol. 14. Almere: ASM International. p. 27-49.

4 International Organization for Standardization. ISO 16630: Metalic Materials - Method of Hole Expanding Test. Technical Specification. Geneva: ISO; 2017.

5 Mista RDK, Thompson SW, Hylton TA, Boucek AJ. Microestructures of hot-rolled high-strength steels with significant differences in edge formability. Metallurgical and Materials Transformation. 2001;32:745-760.

6 Heibel S, Nester W, Clausmeyer T, Tekkaya AE. 2016 Damage characterization of high strength multiphase steels. IOP Conf. Series: Materials Science and Engineering 159 (2016) 012013 doi:10.1088/1757-899X/159/1/012013.

7 International Organization for Standardization. ISO 6892-1:2019 (en): Metallic materials — Tensile testing — Part 1: Method of test at room temperature. Geneva: ISO; 2019.

8 Farrokhi, F. (2018). Hybrid Laser Welding of Large Steel Structures: An Experimental and Numerical Study. Aalborg Universitetsforlag. Ph.d.-serien for Det Ingeniør- og Naturvidenskabelige Fakultet, Aalborg Universitet.

9 Bin LUO, Kaifu ZHANG, Shunuan LIU, Hui CHENG, Runxiao WANG, Investigation on the interface damage in drilling low-stiffness CFRP/Ti stacks, Chinese Journal of Aeronautics, Volume 32, Issue 9, 2019, Pages 2211-2221.

10 Worswick MJ, Finn MJ. The numerical simulation of stretch fange forming. International Journal of Plasticity. 2000;16 (6):701–720.

Submetido em:

Aceito em:

66883734a953956bea635507 tmm Articles
Links & Downloads

Tecnol. Metal. Mater. Min.

Share this page
Page Sections