Taylan Altan, Ph.D.

Professor and Director, ERC/NSM
The Ohio State University
1971 Neil Ave.
Columbus, OH 43210


Phone: 614-292-5063
www.cpforming.org
Contact via email

Stamping | Articles

R&D Update: Predicting springback when bending AHSS and aluminum alloys, Part 1

December 5, 2016 | By Aanandita Katre, Ali Fallahiarezoodar, Taylan Altan, Ph.D.

Editor’s Note: Part II of this article, which will appear in the January/February 2017 issue, will discuss the results and case studies of the newly introduced inverse analysis method for improving springback prediction. In the automotive industry, the use of advanced high-strength steels (AHSS)...

Continue Reading

Stamping | Articles

R&D Update: Practical methods for estimating formability of sheet materials

July 7, 2016 | By Ali Fallahiarezoodar, Berk Aykas, David Diaz Infante, Taylan Altan, Ph.D.

Formability is the ability of a sheet material to deform without failure or fracture. Information on formability helps process and tool design engineers predict failure during analysis of sheet metal forming processes for tool design. Formability information also is used to evaluate...

Continue Reading

Stamping | Articles

R&D Update: Controlling material flow in drawing operations

June 17, 2016 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D., Zeming Yin

The researchers at The Ohio State University's Center for Precision forming perform research on controlling material flow in drawing operation using CNC hydraulic cushions to help improve drawability.

Continue Reading

Stamping | Articles

R&D Update: Lightweighting in the automotive industry using sheet metal forming, Part 2

March 9, 2016 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D.

Editor’s Note: Part I of this article appeared in the January/February 2016 issue.

Continue Reading

Stamping | Articles

R&D Update: Lightweighting in the automotive industry using sheet metal forming, Part 1

January 7, 2016 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D.

The Ohio State University's Center for Precision Forming provides an overview of design considerations and materials used in lightweighting in the automotive industry in the first part of a two-part series.

Continue Reading

Stamping | Articles

R&D Update: Flow stress data and FE simulation

November 30, 2015 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D., Zeming Yin

Finite element (FE)-based computer software commonly is used in the sheet metal forming and stamping industry for die design and for predicting metal flow and thinning in the formed part. It is a useful tool for predicting and preventing forming defects such as fracture and wrinkling. However,...

Continue Reading

Stamping | Articles

R&D Update: Determining flow stress data by combining uniaxial tensile and biaxial bulge tests

October 8, 2015 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D.

In the sheet metal forming industry, finite element (FE) simulation is an important tool for fabricators predicting metal flow, optimizing geometry, and selecting process variables before developing new dies. The accuracy of the simulation results depends highly on the accuracy of the input...

Continue Reading

Stamping | Articles

R&D Update: Forming aluminum alloys at elevated temperatures, Part II

July 1, 2015 | By Taylan Altan, Ph.D., Long Ju

Elevated-temperature (ET) forming of aluminum can be accomplished isothermally or nonisothermally. In isothermal warm forming, the die, blank holder, and punch are heated. In nonisothermal deep drawing, the die and blank holder are heated, and the punch may or may not be cooled. The die and punch...

Continue Reading

Stamping | Articles

R&D Update: Forming aluminum alloys at elevated temperatures, Part 1

June 11, 2015 | By Taylan Altan, Ph.D., Long Ju

To reduce vehicle weight, automotive manufacturers are using advanced high-strength steels (AHSS) and aluminum alloys, formed at room temperature, as well as hot stamping of boron steels. A few OEMs and Tier 1 suppliers also have started warm forming aluminum alloys, usually 5000 and 6000 series,...

Continue Reading

Stamping | Articles

R&D Update: Heat generation in forming of AHSS

March 10, 2015 | By Ali Fallahiarezoodar, Ruzgar Peker, Taylan Altan, Ph.D.

Advanced high-strength steel (AHSS) materials are multiphase steels that contain martensite, bainite, and/or retained austenite. The use of AHSS materials in the automotive industry is increasing every day, because these steels provide strength and satisfy functional requirements at reduced weight....

Continue Reading

Stamping | Articles

R&D Update: Examining lubricant performance in forming of AHSS

February 5, 2015 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D., Suraj Appachu

Lubrication plays an important role in stamping, as it reduces friction at the tool-workpiece interface. Reducing that friction also reduces die and tool wear in large-volume production, which in turn increases tool life. It also allows smoother flow of the sheet material into the die cavity and...

Continue Reading

Stamping | Articles

R&D Update: Warm forming of alloys in the auto industry

June 28, 2013 | By Eren Billur, Taylan Altan, Ph.D.

While stampers struggle with traditional forming of aluminum alloys, particularly in the automotive industry, they should know that research is currently underway to make this tough job easier. Warm forming of certain aluminum alloys is a real possibility when it comes to stamping parts from these difficult-to-work-with materials.

Continue Reading

Metals/Materials | Articles

R&D Update: Hot-stamping boron-alloyed steels for automotive parts

March 10, 2011 | By Taylan Altan, Ph.D.

CPF has conducted experiments using finite element simulation of the hot stamping process. The process can help manufacturers predict such final part properties as thickness, temperature, and hardness distribution.

Continue Reading

Stamping | Articles

R&D Update: Lubrication and galling in stamping of galvanized AHSS - Part III

April 15, 2008 | By Taylan Altan, Ph.D.

Forming of galvanized AHSS involves higher contact pressures at the tool-workpiece interface compared to forming mild steel. Under these severe interface conditions, improper selection of lubricants, tool materials and tool coatings may result in high scrap rates and galling in stamping production.. Based on SDT results, polymer-based lubricant with EP additives and water-soluble DFL were found to be most effective, Synthetic lubricants showed also reasonably small frictional responses with a PVD coated die in forming GA coated strips.

Continue Reading

Stamped component figure 1a

Stamping | Articles

Dissecting defects - Part III

December 11, 2007 | By Taylan Altan, Ph.D.

Editor's Note: This article is part of a three-part series. Part I categorizes defect types and discusses the factors that affect formed part quality; Part II covers various destructive and nondestructive tests for evaluating incoming material; and Part III is an introduction to process monitoring systems.

Continue Reading