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Blank welding high-strength steels.

Shao, Haiping.

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Blank welding high-strength steels.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Blank welding high-strength steels./
Author:	Shao, Haiping.
Description:	201 p.
Notes:	Adviser: Charlie E. Albright.
Contained By:	Dissertation Abstracts International61-11B.
Subject:	Engineering, Automotive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=9994938
ISBN:	9780493040585

Blank welding high-strength steels.
Shao, Haiping.

Blank welding high-strength steels. - 201 p.

Adviser: Charlie E. Albright.

Thesis (Ph.D.)--The Ohio State University, 2000.

Tailor-welded blanks have been widely used in the automotive industry in order to save weight, improve material utilization, reduce high tooling cost, and simplify design. Mash seam welding and laser beam welding are dominant welding processes used in blank welding. Since high-strength steels are increasingly being incorporated into new-generation vehicle designs for further weight reduction, understanding of blank welding high strength steels to mild steels is warranted.

ISBN: 9780493040585Subjects--Topical Terms:

1018477
Engineering, Automotive.

Blank welding high-strength steels.
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020 $a 9780493040585
035 $a (UMI)AAI9994938
035 $a AAI9994938
040 $a UMI $c UMI
100 1 $a Shao, Haiping. $3 1275152
245 1 0 $a Blank welding high-strength steels.
300 $a 201 p.
500 $a Adviser: Charlie E. Albright.
500 $a Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5985.
502 $a Thesis (Ph.D.)--The Ohio State University, 2000.
520 $a Tailor-welded blanks have been widely used in the automotive industry in order to save weight, improve material utilization, reduce high tooling cost, and simplify design. Mash seam welding and laser beam welding are dominant welding processes used in blank welding. Since high-strength steels are increasingly being incorporated into new-generation vehicle designs for further weight reduction, understanding of blank welding high strength steels to mild steels is warranted.
520 $a Four representative high-strength steels with nominal thicknesses of 0.03 in. were selected to be welded to similar-gauge mild steels in this investigation. The high-strength steels studied included two transformation-hardened steels, one interstitial-free (IF) rephosphorized steel, and one strengthened by both niobium grain refinement and transformation hardening. Mash Seam welding and laser beam welding were conducted between high-strength and mild steel sheets.
520 $a Effective mash seam welds and laser beam welds can be made between higher-strength level automotive steels and mild steels for blank welding applications. For the mash seam welded blanks produced between transformation hardened steel with high carbon content (greater than 0.1%) and mild steel, the combination of fully martensitic microstructure in high carbon steel weld zone and thick and wide mash seam weld zone resulted in premature failure during equiaxial stretching formability testing, and significantly lower formability. Laser welding greatly improved the equiaxial stretching formability of welded blanks produced between transformation hardened high strength steel with high carbon content and mild steel.
520 $a In transverse tensile of welded blanks, the strain perpendicular to the weld line tended to be restricted to the lower strength material. The ratio of the yield strength of the high strength steel to the tensile strength of the mild steel determined the distribution of strain perpendicular to weld in welded blanks, consequently the forming capability of the welded blanks in this direction.
520 $a In longitudinal tensile testing of mash seam welded blanks, ductility and strength were largely controlled by the mash seam welds. In longitudinal tensile testing of laser welded blanks, ductility and strength were dictated by the attached high-strength sheets, stress concentrations associated with welds also had a minor effect.
520 $a The equiaxial stretching formability was evaluated by ball-punch testing. For welded blanks except for mash seam welded blanks produced between transformation hardened steel with 0.11% C to mild steel, the formability was determined by the following three factors: the strength difference of parent steels, the forming capability of the mild steel, and the reduced strain at failure associated with the weld.
590 $a School code: 0168.
650 4 $a Engineering, Automotive. $3 1018477
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, Metallurgy. $3 1023648
690 $a 0540
690 $a 0548
690 $a 0743
710 2 $a The Ohio State University. $3 718944
773 0 $t Dissertation Abstracts International $g 61-11B.
790 $a 0168
790 1 0 $a Albright, Charlie E., $e advisor
791 $a Ph.D.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=9994938