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Title: Laser Intensity Profile Effects on the Solidification Microstructure of Ti-6Al-4V and Ti-5553

Abstract

Traditional machining of Ti-6Al-4V and Ti-5Al-5Mo-5V-3Cr (Ti-5553) is challenging due to high chemical reactivity, adiabatic shear band formation, and material cost. Titanium is attractive because of its high tensile strength, low density, corrosion resistance, and ability to withstand extreme temperatures. Selective Laser Melting (SLM) is capable of manufacturing geometrically complicated parts at a lower expense. Exceptional tolerances can be obtained with properly tuned processing parameters. Alterations on scan parameters permit microstructure and melt pool control. Single track laser melting experiments were performed on Ti-6Al-4V and Ti- 5553 using elliptical intensity profiles. Results show that maintaining constant energy density but increasing power results in a melt pool failing to penetrate the substrate for Ti-5553. Increasing laser energy density increases melt pool width and can increase powder bed denudation. Comparing Ti64 and Ti-5553 microstructures contributes to a better understanding of rapid solidification in titanium.

Authors:
 [1];  [2];  [2];  [2];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Material Science Division; Univ. of the Pacific, Stockton, CA (United States). Dept. of Mechanical Engineering
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Material Science Division
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1466179
Report Number(s):
LLNL-TR-756734
944352
DOE Contract Number:  
AC52-07NA27344; 18-SI-003
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING

Citation Formats

Ramme, Jacob C., Roehling, Tien T., Roehling, John D., McKeown, Joseph T., and Matthews, Manyalibo J. Laser Intensity Profile Effects on the Solidification Microstructure of Ti-6Al-4V and Ti-5553. United States: N. p., 2018. Web. doi:10.2172/1466179.
Ramme, Jacob C., Roehling, Tien T., Roehling, John D., McKeown, Joseph T., & Matthews, Manyalibo J. Laser Intensity Profile Effects on the Solidification Microstructure of Ti-6Al-4V and Ti-5553. United States. doi:10.2172/1466179.
Ramme, Jacob C., Roehling, Tien T., Roehling, John D., McKeown, Joseph T., and Matthews, Manyalibo J. Fri . "Laser Intensity Profile Effects on the Solidification Microstructure of Ti-6Al-4V and Ti-5553". United States. doi:10.2172/1466179. https://www.osti.gov/servlets/purl/1466179.
@article{osti_1466179,
title = {Laser Intensity Profile Effects on the Solidification Microstructure of Ti-6Al-4V and Ti-5553},
author = {Ramme, Jacob C. and Roehling, Tien T. and Roehling, John D. and McKeown, Joseph T. and Matthews, Manyalibo J.},
abstractNote = {Traditional machining of Ti-6Al-4V and Ti-5Al-5Mo-5V-3Cr (Ti-5553) is challenging due to high chemical reactivity, adiabatic shear band formation, and material cost. Titanium is attractive because of its high tensile strength, low density, corrosion resistance, and ability to withstand extreme temperatures. Selective Laser Melting (SLM) is capable of manufacturing geometrically complicated parts at a lower expense. Exceptional tolerances can be obtained with properly tuned processing parameters. Alterations on scan parameters permit microstructure and melt pool control. Single track laser melting experiments were performed on Ti-6Al-4V and Ti- 5553 using elliptical intensity profiles. Results show that maintaining constant energy density but increasing power results in a melt pool failing to penetrate the substrate for Ti-5553. Increasing laser energy density increases melt pool width and can increase powder bed denudation. Comparing Ti64 and Ti-5553 microstructures contributes to a better understanding of rapid solidification in titanium.},
doi = {10.2172/1466179},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}