Solidification in direct metal deposition by LENS processing

被引：274

作者：

Hofmeister, W ^{[1
]}

Griffith, M ^{[1
]}

Ensz, M ^{[1
]}

Smugeresky, J ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA

来源：

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY | 2001年 / 53卷 / 09期

关键词：

Cooling - Deposition - Heat conduction - Infrared imaging - Interfaces (materials) - Laser applications - Metallographic microstructure - Metallography - Stainless steel;

D O I：

10.1007/s11837-001-0066-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermal imaging and metallographic analysis were used to study Laser Engineered Net Shaping (LENS(TM)) processing of 316 stainless steel and H13 tool steel. The cooling rates at the solid-liquid interface were measured over a range of conduction conditions. The length scale of the molten zone controls cooling rates during solidification in direct metal deposition. In LENS processing, the molten zone ranges from 0.5 non in length to 1.5 mm, resulting in cooling rates at the solid-liquid interface ranging from 200-6,000 Ks(-1).

引用

页码：30 / 34

页数：5

共 24 条

[1]

ADAMS CM, 1958, LIQUID METALS SOLIDI, P00187

[2]

ATWOOD CL, 1999, P ICALEO 98 ORL FL L

[3]

Bloembergen N., 1979, LASER SOLID INTERACT, P1, DOI DOI 10.1063/1.31659

[4]

Brooks J, 1999, SOL FREEFORM FABRIC, P375

[5] Thermomechanical modeling of molten metal droplet solidification applied to layered manufacturing [J].

Chin, RK ;

Beuth, JL ;

Amon, CH .

MECHANICS OF MATERIALS, 1996, 24 (04) :257-271

[6]

DeWitt D., 1988, THEORY PRACTICE RAD

[7]

DYKHUIZEN RC, 1998, COMMUNICATION 0202

[8] Understanding the microstructure and properties of components fabricated by Laser Engineered Net Shaping (LENS) [J].

Griffith, ML ;

Ensz, MT ;

Puskar, JD ;

Robino, CV ;

Brooks, JA ;

Philliber, JA ;

Smugeresky, JE ;

Hofmeister, WH .

SOLID FREEFORM AND ADDITIVE FABRICATION-2000, 2000, 625 :9-20

[9]

Griffith ML, 1997, SOL FREEFORM FABRIC, P387

[10] Understanding thermal behavior in the LENS process [J].

Griffith, ML ;

Schlienger, ME ;

Harwell, LD ;

Oliver, MS ;

Baldwin, MD ;

Ensz, MT ;

Essien, M ;

Brooks, J ;

Robino, CV ;

Smugeresky, JE ;

Hofmeister, WH ;

Wert, MJ ;

Nelson, DV .

MATERIALS & DESIGN, 1999, 20 (2-3) :107-113

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